James; have you checked out istockphoto.com? I think you could make some cash by selling your photoshop work there… here are just some of the designs/images I have bookmarked for purchasing for future projects http://www.istockphoto.com/file_search.php?action=file&lightboxID=3522444
Here is how it works; artists work up their stuff and upload it to istock photo and set their price. Web designers, graphic artists, etc come and browse your work and buy it if they like it for reasonable prices. You get a share of the sale price and so does istock. Not sure about the percentages.
People buy photos, video, vector artwork, photoshop layouts, anything. No porn so don’t bother uploading your “low hangers.”
I’ve seen lots of designs that sell over and over again for decent amounts. This seems like a fun way to make some residual cash. Check it out and tell me why it sucks or you don’t like the idea.