xmms-scrobbler is a plugin for xmms that feeds data about the music you listen to to http://www.audioscrobbler.com/. I am the Debian package maintainer, with many thanks to Steve McIntyre for sponsoring the package.
There is also a plugin for beep media player which is also built by the xmms-scrobbler source package.
For more information on audio scrobbler visit http://www.audioscrobbler.com/. To install the debian package, if you're using Debian unstable, apt-get install xmms-scrobbler or, for the beep media player, apt-get install beep-media-player-scrobbler.