Ted, I've actually considered taking some of my better improvisations and getting the sound quality tidied up a bit, then putting it digitally on CD Baby. It's a bit of a niche interest of course, but it is at the back of my mind.
If you upload an MP3 (better yet, wav or other lossless recording), I'll take a shot at tidying up the sound. I'm not a professional mastering engineer by trade, but I've spent many hundreds (if not thousands) of hours mixing and mastering. It's great fun for me to have fresh source material to work with.