Check this out! It's rather spooky how accurate it can be!
Basically, it is a "Twenty Questions" type of game where you think of a character or person from any form of entertainment. I've used some pretty obscure characters and had some rather surprisingly quick results.
http://us.akinator.com
I know that this thread could be barraged with "OFF TOPIC DISCUSSION" posts, but given that its main audience will most likely select film/television characters/actors/actresses as their subjects, it fits in nicely with the "FILM & TV DISCUSSION" section.