Just found a great site where you can build up a list of all the albums you own. It's similar to the dvd ones i've seen. http://rateyourmusic.com/
There's a site similar to that one. http://www.last.fm/ It builds up a profile of your music listing what you favourite is, and all that. It includes a safe plugin for Windows Media player and Winamp which sends the name of the tracks to your profile. It's pretty cool. -Mike