I am the DVD art swapping guy. I have not heard anything about creating a CD art swapping thread, but it seems like a great idea. Interest in the DVD art swapping was modest at first, but I am seeing more interest. I have made 5 trades of artwork myself, and in the last week or so, a couple of users have posted subtantial lists of "art available".
I think you just need someone to do it. I nominate you, under the tradition that the person that is community minded enough to identify a need should be punished by having to fill that need.

If you want to keep it simple, at least at first, you could just start a thread with a list of your artwork, see if anybody chimes in with art they have or need. Later, you could create something more systematic, a la the DVD thread.
I am interested to see how much interest there is. DVD traders are like yapping dogs, they always want new features, changes to trading, to complain, compliment and conversationalize. Book traders are like cats. Usually quiet and alert, but occasionally they get riled up and make a racket that you can't believe is coming from such normally reticent creatures. CD traders are like little mice, you never hear from them, but you know they are around because of the "evidence" they leave. My analogy needs some work, because to my knowledge, no book trader has ever eaten a CD trader. Plus there are chimeric cat-dog, mouse-dog and other hybrid creatures.