c99koder, known from homebrews on other systems, now hits the iPhone with MobileScrobbler.

MobileScrobbler connects your Apple iPhone or iPod Touch with the Last.fm social music website. As you listen to music on your device, MobileScrobbler sends the title, artist, and album to the Last.fm website. Last.fm uses this information to suggest new music, new friends, concerts, and events based on the music you listen to.