MusicMobs.org
Today while reading Slashdot I came accross this reference to (or, if you prefer, shameless self promotion of)MusicMobs.org. MusicMobs is a site where you upload your iTunes xml file, which contains your complete library playlist and metadata. Then you can compare it to the playlists of other people.
The site is in beta currently, and there are some obvious features missing, like direct links to the iTunes music store (which I’ve already already suggested to the site admin via email). But it already seems like a good way to find new music to listen to. Actually, there are a whole lot of interesting things you could do with that data. Brilliant idea.