If you didn't get a chance to try it last weekend, the Audio Surf beta is up and running again (probably for another weekend). The game is an IGF finalist, and a varied puzzle-rythym hybrid that plays based on your own music. You can read more and signup for the mailing list at the website or tsunamikitsune's old blog about it. I would guess signing up for the mailing list will get you an e-mail with the beta link, if not, I can post it up here.

Also if you like the game, you can vote for it on the IGF Audicence Award here.