Anyone else here use
Last.fm? It's a pretty cool music community where you have your own profile and information from every song you listen to on your computer is uploaded to it. After you have enough info uploaded, it goes out and finds music "neighbors", or people who share similar music interests as you do. It also creates charts based on your listening habits. And to top it all off, it also creates your own personal internet radio stations that plays music similar to what you're interested in. My profile is at
http://www.last.fm/user/PrimalReason .