Audiosurf

A new beta update has been issued for Audiosurf. This update adds support for last.fm scrobbling as well as the ability to have freeride mode run in the background as a sort of visualizer. This means that now all the songs you play in Audiosurf can be scrobbled to your last.fm account woot. If you don't know what last.fm is, go there now!
If you want in on this beta patch, head over to http://www.audio-surf.com/forum/index.php/topic,2789.0.html

Or you can just wait a few days for the official steam release to be released. Happy scrobbling/surfing!