I was searching the web for a CD rental service like blockbuster and netflix are for DVDs. Needless to say, I didn't find anything like that, probably because audio CDs have no copy protection.
What I did find though was this
SwapaCD.comIt does cost a small fee, 49¢ to "order" a cd. That 49¢ goes to the SwapaCD people and when you send out a CD you're the one paying shipping but for a little over $1 you can trade a CD you're not into anymore for something that is more likely to be of use to you.
Looks really cool. I just signed up and will shortly be posting some CDs. While I was registering I noticed that there was a field to enter a referrer, not sure if you get anything by referring people but if you want to, feel free to use my SN which is also crashwg or my email address which is crashwg@comcast.net.