New link:
Akinator, the Web Genius
My daughter loves it! He guessed most of the cast of Madagascar - Marty (the zebra), Alec (the lion), the giraffe... but he missed Gloria (the hippo)!
I wonder how many people would have to play Steve Pavlina before it could guess him?? I played him about 5 times, but he never even made the list of alternates.