Scrobble Droid watches the music you listen to and sends information about it to Last.fm, where they use that information to do things like make personalized charts for you and make recommendations about other music you might like.

Changes:

Changed the Last.fm sign-up link to the regular (non-mobile) version because the CAPTCHA on the mobile version was apparently not always working.

http://code.google.com/p/scrobbledroid/