Found a new CD sharing website www.lala.com
List the CD's you have, list the CD's you want and you pay $1 to start trading CD's.
Not a bad idea but who is collecting CD's anymore.
Everything is MP3's or itunes.
So, even tho the idea is novel it might not be a great idea. Why not do the same thing and share mp3's that you bought. Oh, then you need a self destruction mechanism ha ha ha