I've been talking about doing this for a while and I am excited to report that I have finally moved forward. I am now selling digital art prints at Curioos. Available sizes are 12x12 inches, 16x16 inches, and 20x20 inches. Choose unframed, white frame, black frame, or a very informal yet ingenious device called a "poster pant" hanger.
Catalog No. 1 and individual art works linking to the Curioos site can be viewed on my tumblr.