map.resource :users,
  :collection => {:reset_password => :get,
                  :reset_password => :post}

# GET  /users/reset_password  => Renders reset_password screen
# POST /users/reset_password?email=joe@blow.com => goes back to login screen with flash

UsersController

  def reset_password
    @user = User.find_by_email(params[:email])
    @user.reset_password!
    respond_to do |format|
      format.html do
        flash[:notice] = "Successfully reset password, check ur email"
        redirect_to login_path
      end
    end
  rescue
    # This should get rendered if there is no email param
  end