There's a game that will be downloadable on the PS3 called "Flow" or "flOw" which I read about over at Kotaku, and in the comment thread discussing it a user threw out the links to a version playable online - it's pretty interesting. You can click that link to play it, and you can also head over here (highly recommended) to delve into the philosophy behind it. I think you'll be intrigued.
(CW)TB
September 22, 2006