diff --git a/app/controllers/subscribes_controller.rb b/app/controllers/subscribes_controller.rb
new file mode 100644
index 000000000..4bb51be46
--- /dev/null
+++ b/app/controllers/subscribes_controller.rb
@@ -0,0 +1,31 @@
+class SubscribesController < ApplicationController
+  def create
+    @subscribe = @subscribeable.subscribes.build(:user_id => current_user.id)
+    if @subscribe.save
+      flash[:notice] = I18n.t("flash.subscribe.saved")
+      redirect_to :back
+    else
+      flash[:error] = I18n.t("flash.subscribe.saved_error")
+      redirect_to :back
+    end
+  end
+
+  def destroy
+    @subscribe = Subscribe.find(params[:id])
+    @subscribe.destroy
+
+    flash[:notice] = t("flash.subscribe.destroyed")
+    redirect_to :back
+  end
+
+  private
+
+  def find_subscribeable
+    params.each do |name, value|
+      if name =~ /(.+)_id$/
+        return $1.classify.constantize.find(value)
+      end
+    end
+    nil
+  end
+end
diff --git a/app/helpers/subscribes_helper.rb b/app/helpers/subscribes_helper.rb
new file mode 100644
index 000000000..dc1b490ec
--- /dev/null
+++ b/app/helpers/subscribes_helper.rb
@@ -0,0 +1,2 @@
+module SubscribesHelper
+end
diff --git a/app/mailers/user_mailer.rb b/app/mailers/user_mailer.rb
index 3137b0dff..2c43482e1 100644
--- a/app/mailers/user_mailer.rb
+++ b/app/mailers/user_mailer.rb
@@ -5,7 +5,31 @@ class UserMailer < ActionMailer::Base
 
   def new_user_notification(user)
     @user = user
-    mail(:to => user.email, :subject => "Регистрация на проекте «#{APP_CONFIG['project_name']}»") do |format|
+    mail(:to => user.email, :subject => I18n.t("notifications.subjects.new_user_notification", :project_name => APP_CONFIG['project_name'])) do |format|
+      format.html
+    end
+  end
+
+  def new_comment_notification(comment, user)
+    @user = user
+    @comment = comment
+    mail(:to => user.email, :subject => I18n.t("notifications.subjects.new_comment_notification")) do |format|
+      format.html
+    end
+  end
+
+  def new_issue_notification(issue, user)
+    @user = user
+    @issue = issue
+    mail(:to => user.email, :subject => I18n.t("notifications.subjects.new_issue_notification")) do |format|
+      format.html
+    end
+  end
+
+  def issue_assign_notification(issue, user)
+    @user = user
+    @issue = issue
+    mail(:to => user.email, :subject => I18n.t("notifications.subjects.issue_assign_notification")) do |format|
       format.html
     end
   end
diff --git a/app/models/comment.rb b/app/models/comment.rb
index 4c15a8b66..36e14c412 100644
--- a/app/models/comment.rb
+++ b/app/models/comment.rb
@@ -3,4 +3,20 @@ class Comment < ActiveRecord::Base
   belongs_to :user
 
   validates :body, :user_id, :commentable_id, :commentable_type, :presence => true
+
+  after_create :deliver_new_comment_notification
+
+  protected
+
+  def deliver_new_comment_notification
+    #UserMailer.new_comment_notification(self, self.commentable.user).deliver
+    #UserMailer.new_comment_notification(self, self.commentable.project.owner).deliver
+    recipients = self.commentable.project.relations.by_role('admin').where(:object_type => 'User').map { |rel| rel.read_attribute(:object_id) }
+    recipients = recipients | [self.commentable.user_id]
+    recipients = recipients | [self.commentable.project.owner_id] if self.commentable.project.owner_type == 'User'
+    recipients.each do |recipient_id|
+      recipient = User.find(recipient_id)
+      UserMailer.new_comment_notification(self, recipient).deliver
+    end
+  end
 end
diff --git a/app/models/issue.rb b/app/models/issue.rb
index ad6f57468..586175b89 100644
--- a/app/models/issue.rb
+++ b/app/models/issue.rb
@@ -5,12 +5,17 @@ class Issue < ActiveRecord::Base
   belongs_to :user
 
   has_many :comments, :as => :commentable
+  has_many :subscribes, :as => :subscribeable
 
   validates :title, :body, :project_id, :user_id, :presence => true
 
   #attr_readonly :serial_id
 
   after_create :set_serial_id
+  after_create :subscribe_users
+  after_create :deliver_new_issue_notification
+  after_create :deliver_issue_assign_notification
+  after_update :deliver_issue_assign_notification
 
   protected
 
@@ -18,4 +23,38 @@ class Issue < ActiveRecord::Base
     self.serial_id = self.project.issues.count
     self.save!
   end
+
+  def deliver_new_issue_notification
+    #UserMailer.new_issue_notification(self, self.project.owner).deliver
+    #self.project.relations.by_role('admin').each do |rel|
+    #  admin = User.find(rel.object_id)
+    #  UserMailer.new_issue_notification(self, admin).deliver
+    #end
+
+    recipients = collect_recipient_ids
+    recipients.each do |recipient_id|
+      recipient = User.find(recipient_id)
+      UserMailer.new_issue_notification(self, recipient).deliver
+    end
+  end
+
+  def deliver_issue_assign_notification
+    UserMailer.issue_assign_notification(self, self.user).deliver if self.user_id_was != self.user_id
+  end
+
+  def subscribe_users
+    recipients = collect_recipient_ids
+    recipients.each do |recipient_id|
+      ss = self.subscribes.build(:user_id => recipient_id)
+      ss.save!
+    end
+  end
+
+  def collect_recipient_ids
+    recipients = self.project.relations.by_role('admin').where(:object_type => 'User').map { |rel| rel.read_attribute(:object_id) }
+    recipients = recipients | [self.user_id]
+    recipients = recipients | [self.project.owner_id] if self.project.owner_type == 'User'
+    recipients
+  end
+
 end
diff --git a/app/models/relation.rb b/app/models/relation.rb
index 822687dca..a08ddf6a9 100644
--- a/app/models/relation.rb
+++ b/app/models/relation.rb
@@ -10,6 +10,7 @@ class Relation < ActiveRecord::Base
 
   scope :by_object, lambda {|obj| {:conditions => ['object_id = ? AND object_type = ?', obj.id, obj.class.to_s]}}
   scope :by_target, lambda {|tar| {:conditions => ['target_id = ? AND target_type = ?', tar.id, tar.class.to_s]}}
+  scope :by_role, lambda {|role| {:conditions => ['role = ?', role]}}
 
   def self.create_with_role(object, target, role)
     r = new
diff --git a/app/models/subscribe.rb b/app/models/subscribe.rb
new file mode 100644
index 000000000..0c3a52698
--- /dev/null
+++ b/app/models/subscribe.rb
@@ -0,0 +1,4 @@
+class Subscribe < ActiveRecord::Base
+  belongs_to :subscribeable, :polymorphic => true
+  belongs_to :user
+end
diff --git a/app/views/issues/show.html.haml b/app/views/issues/show.html.haml
index 51c080e4a..69c2be747 100644
--- a/app/views/issues/show.html.haml
+++ b/app/views/issues/show.html.haml
@@ -20,6 +20,14 @@
           = t('activerecord.attributes.issue.status')
           \:
         = @issue.status
+      %p
+        %b
+          = t('layout.issues.subscribe')
+          \:
+        - if @issue.subscribes.exists? :user_id => current_user.id
+          = link_to t('layout.issues.unsubscribe_btn'), unsubscribe_issue(@issue), :method => :post
+        - else
+          = link_to t('layout.issues.subscribe_btn'), subscribe_issue(@issue), :method => :delete
 
 %a{ :name => "comments" }
 .block
diff --git a/app/views/user_mailer/issue_assign_notification.haml b/app/views/user_mailer/issue_assign_notification.haml
new file mode 100644
index 000000000..72e99e7df
--- /dev/null
+++ b/app/views/user_mailer/issue_assign_notification.haml
@@ -0,0 +1,7 @@
+%p== Здравствуйте, #{@user.name}.
+
+
+%p Вам была назначена задача #{ link_to @issue.title, show_issue_path(@issue.project, @issue.serial_id) }
+
+
+%p== Команда поддержки «ROSA Build System»
diff --git a/app/views/user_mailer/new_comment_notification.haml b/app/views/user_mailer/new_comment_notification.haml
new file mode 100644
index 000000000..0e57ff415
--- /dev/null
+++ b/app/views/user_mailer/new_comment_notification.haml
@@ -0,0 +1,7 @@
+%p== Здравствуйте, #{@user.name}.
+
+
+%p К задаче #{ link_to @comment.commentable.title, show_issue_path(@comment.commentable.project, @comment.commentable.serial_id) } был добавлен новый комментарий.
+
+
+%p== Команда поддержки «ROSA Build System»
diff --git a/app/views/user_mailer/new_issue_notification.haml b/app/views/user_mailer/new_issue_notification.haml
new file mode 100644
index 000000000..e98f32f45
--- /dev/null
+++ b/app/views/user_mailer/new_issue_notification.haml
@@ -0,0 +1,7 @@
+%p== Здравствуйте, #{@user.name}.
+
+
+%p К проекту #{ link_to @issue.project.name, project_path(@issue.project) } была добавлена задача #{ link_to @issue.title, show_issue_path(@issue.project, @issue.serial_id) }
+
+
+%p== Команда поддержки «ROSA Build System»
diff --git a/config/locales/ru.yml b/config/locales/ru.yml
index 97eea839c..563ffdea7 100644
--- a/config/locales/ru.yml
+++ b/config/locales/ru.yml
@@ -106,6 +106,9 @@ ru:
         open: Открытые
         closed: Закрытые
         any: Все
+      subscribe: Подписка на уведомления
+      subscribe_btn: Подписаться
+      unsubscribe_btn: Отписаться
 
     comments:
       confirm_delete: Вы уверены, что хотите удалить комментарий?
@@ -653,3 +656,9 @@ ru:
         distro: Дистрибутив
         platform: Архитектура
         counter: Закачки
+  notifications:
+    subjects:
+      new_comment_notification: Новый комментарий к Вашей задаче
+      new_issue_notification: Новая задача добавлена к проекту
+      new_user_notification: Регистрация на проекте «%{ project_name }»
+      issue_assign_notification: Вам назначили задачу
diff --git a/config/routes.rb b/config/routes.rb
index 4a0227e63..e71991c55 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -78,6 +78,9 @@ Rosa::Application.routes.draw do
     resources :categories, :only => [:index, :show]
   end
 
+  match "issues/:issue_id/subscribe" => 'subscribes#create', :as => :subscribe_issue, :via => :post
+  match "issues/:issue_id/unsubscribe" => 'subscribes#destroy', :as => :unsubscribe_issue, :via => :delete
+
   match "projects/:project_id/issues/:serial_id" => 'issues#show', :serial_id => /\d+/, :as => :show_issue, :via => :get
   match "projects/:project_id/issues/:serial_id/edit" => 'issues#edit', :serial_id => /\d+/, :as => :edit_issue, :via => :get
   resources :projects do
diff --git a/db/migrate/20111226141947_create_subscribes.rb b/db/migrate/20111226141947_create_subscribes.rb
new file mode 100644
index 000000000..631e09f09
--- /dev/null
+++ b/db/migrate/20111226141947_create_subscribes.rb
@@ -0,0 +1,14 @@
+class CreateSubscribes < ActiveRecord::Migration
+  def self.up
+    create_table :subscribes do |t|
+      t.integer :subscribeable_id
+      t.string :subscribeable_type
+      t.integer :user_id
+      t.timestamps
+    end
+  end
+
+  def self.down
+    drop_table :subscribes
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 55f94564c..1aece65f1 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -10,7 +10,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20111221194422) do
+ActiveRecord::Schema.define(:version => 20111226141947) do
 
   create_table "arches", :force => true do |t|
     t.string   "name",       :null => false
@@ -245,7 +245,6 @@ ActiveRecord::Schema.define(:version => 20111221194422) do
     t.string   "object_type"
     t.integer  "target_id"
     t.string   "target_type"
-    t.integer  "role_id"
     t.datetime "created_at"
     t.datetime "updated_at"
     t.string   "role"
@@ -272,18 +271,26 @@ ActiveRecord::Schema.define(:version => 20111221194422) do
   add_index "rpms", ["project_id", "arch_id"], :name => "index_rpms_on_project_id_and_arch_id"
   add_index "rpms", ["project_id"], :name => "index_rpms_on_project_id"
 
+  create_table "subscribes", :force => true do |t|
+    t.integer  "subscribeable_id"
+    t.string   "subscribeable_type"
+    t.integer  "user_id"
+    t.datetime "created_at"
+    t.datetime "updated_at"
+  end
+
   create_table "users", :force => true do |t|
     t.string   "name"
-    t.string   "email",                                 :default => "", :null => false
-    t.string   "encrypted_password",     :limit => 128, :default => "", :null => false
+    t.string   "email",                               :default => "", :null => false
+    t.string   "encrypted_password",   :limit => 128, :default => "", :null => false
+    t.string   "password_salt",                       :default => "", :null => false
     t.string   "reset_password_token"
-    t.datetime "reset_password_sent_at"
+    t.string   "remember_token"
     t.datetime "remember_created_at"
     t.datetime "created_at"
     t.datetime "updated_at"
-    t.string   "uname"
     t.text     "ssh_key"
-    t.integer  "role_id"
+    t.string   "uname"
     t.string   "role"
   end
 
diff --git a/spec/controllers/subscribes_controller_spec.rb b/spec/controllers/subscribes_controller_spec.rb
new file mode 100644
index 000000000..e1c466cb3
--- /dev/null
+++ b/spec/controllers/subscribes_controller_spec.rb
@@ -0,0 +1,5 @@
+require 'spec_helper'
+
+describe SubscribesController do
+
+end
diff --git a/spec/factories/subscribes.rb b/spec/factories/subscribes.rb
new file mode 100644
index 000000000..f0644816f
--- /dev/null
+++ b/spec/factories/subscribes.rb
@@ -0,0 +1,6 @@
+# Read about factories at http://github.com/thoughtbot/factory_girl
+
+FactoryGirl.define do
+  factory :subscribe do
+    end
+end
\ No newline at end of file
diff --git a/spec/helpers/subscribes_helper_spec.rb b/spec/helpers/subscribes_helper_spec.rb
new file mode 100644
index 000000000..c72869cf9
--- /dev/null
+++ b/spec/helpers/subscribes_helper_spec.rb
@@ -0,0 +1,15 @@
+require 'spec_helper'
+
+# Specs in this file have access to a helper object that includes
+# the SubscribesHelper. For example:
+#
+# describe SubscribesHelper do
+#   describe "string concat" do
+#     it "concats two strings with spaces" do
+#       helper.concat_strings("this","that").should == "this that"
+#     end
+#   end
+# end
+describe SubscribesHelper do
+  pending "add some examples to (or delete) #{__FILE__}"
+end
diff --git a/spec/models/subscribe_spec.rb b/spec/models/subscribe_spec.rb
new file mode 100644
index 000000000..0df4fbb42
--- /dev/null
+++ b/spec/models/subscribe_spec.rb
@@ -0,0 +1,5 @@
+require 'spec_helper'
+
+describe Subscribe do
+  pending "add some examples to (or delete) #{__FILE__}"
+end