Enter at your own risk : DINKYBALL!!!!!
Warning : Not recommended for students or working folk or anyone who basically needs to get something done during the day.
There are more fun things here, but I haven't had the chance to check most of it out yet myself, so I make no warranties or representations as to its quality and/or general fun levels...
Also, I swear this game is not the reason why I haven't posted in two weeks. I swear.