Review my start-up: Customized Graphics
amohr: I love it - I have been looking for exactly this service for a while now.  I have a bunch of ideas for these types of items that have never really gotten off the ground due to the overhead.I opened a store front (http://www.customizedgraphics.com/alexophile) and the main thing I would suggest is having more categories.  Work tends to get buried and poorly organized when there's too few categories.  The use of tags only obfuscates this slightly, especially if someone doesn't actually know what they're looking for.