I started using the MSN Music Service tonight, just to see how it compares to Napster. Pretty cool. I bought one album, The Hives new one. The only thing I see that sucks is that you cant re-sync downloads if your computer crashes. It says you are responsible to back them up. What a PITA. They do allow you to have the music on 5 computers though (Napster is 3)
Check it out!