Fun: 20 Questions
I'm sure this has been posted elsewhere, but here's a website which you can challenge to guess something in 20 questions. It's actually pretty good at it, especially if you pick a concrete physical object. If you go with an abstract, like "my blog", it doesn't always do so well. (courtesy of a random blog hit on k2h.)
Sometimes the questions it asks are pretty funny, too:
26. Can it cheer you up? No.
27. Does it help accomplish tasks? Yes.
28. Does it have anything to do with salad? No.
29. I guess that it is a lumberjack? Close.
I was actually thinking "coworker".