iTunes works fine for me (and if not, I can see similar artists in Last.FM without an account), and no one around here really has a similar taste in music as me (we don't have high compatibility either, music wise), so I don't really see the point. I doubt I'll use mine any more than the evening when I set it up. :/
I guess my tastes in music are quite broad given I have a tendency to like songs rather than artists and specific genres. It's nice having other people's playlists to dive into. :3
A reader lives a thousand lives before he dies. The man who never reads lives only one.