My favorites:
Fickr:
Take a drink for every picture of someone's cat.
Finish a six pack if you've posted pictures of your cat.
Wikipedia:
Drink a keg if there's an entry for you on Wikipedia — and you didn't submit it.
Digg:
Take a drink if you see a story on the Digg front page about Digg itself.
Take another drink if the story is about Digg founder Kevin Rose.
Take another drink if the story about Kevin Rose is a half-baked conspiracy theory.
My contribution: Take a drink every time Dave Winer whines about O'Reilly.
