I just signed up for Last.Fm instead of revising. It's pretty cool so far.
The basic jist of it is that you install a plugin for your media player that sends the tracks you play on it to a central database and you can then see what has been listened to on your profile page. This means my music tastes are now exposed to the public and I may have to start listening to good music, that isn't utter shite and embarassing deletes wham mp3's
Anyway, check out my profile here and see below for my latest tracks.
