def method_cache_wrapper(reload = false)
    cache_key = "#{self.id}_#{method}"
    response = User.memcache.get(cache_key) if User.memcache
    unless response && !reload
      response = yield
      User.memcache.set(cache_key, response, 60 * 60 * 24 - 1) if User.memcache
    end
    response
  end

  def facebook_friends_list(reload = false)
    @friends_get = method_cache_wrapper(reload) do
      facebook_session.friends_get.uid_list
    end
    users = User.find_all_by_facebook_uid(@friends_get, :include => [:source])
    users.each do |u|
      self.sources << u.source if !self.sources.include?(u.source)
    end
    @friends_get
  end