A few links for those who need something to waste their time with.
This site has pretty much every video game ever, in a web-accessible version. Hat tip to Jeremy for finding it.
Ward Farnsworth's Predator at the Chessboard is a great resource for beginners looking to learn about chess tactics. Hat tip to Professor Volokh who recommended it.
And then there's always the old standby, Popcap, which has some of the best digital crack rock around.