gistfile1.rb

# more for routes
map.forgot_password '/forgot_password', :controller => 'users', :action => 'forgot_password'
map.reset_password '/reset_password', :controller => 'users', :action => 'reset_password'

# app/models/user_observer.rb
class UserObserver < ActiveRecord::Observer
  def after_create(user)
    UserNotifier.deliver_signup_notification(user)
  end

  def after_save(user) 
    UserNotifier.deliver_activation(user) if user.recently_activated?
    UserNotifier.deliver_forgot_password(user) if user.recently_forgot_password?
    UserNotifier.deliver_reset_password(user) if user.recently_reset_password?   
  end
end