We have been talking around the office about new features we would like to see in YAF.net and the idea of a Like or Dislike button keeps coming up. The idea is that you could vote up or down either a Topic or a Post in a Topic and a running total of Like's or Dislike's would be kept. This way if you like what someone said you could show that by Liking the Post/Topic without having to post your own comment further adding to the thread for each Topic.

Something similar like that is already included the thanks function for topics. And also an reputation system for users where you can give a user an +1 (like) or -1 (dislike) per day. Not sure if a third system would fit in.

Actualy he asks for a transformed thanks feature with a boolean token added to table.