I make some money from my photos and from my digital art, I've looked at photo libraries and remain sceptical I'm looking for agents to sell my art and photos under licence to industry.
I also make embroidery, tapestry and rug making patterns from my work. Just started so will be interested to see how it goes.
Most of my money comes through Second Life, I sell my art and photography there as framed prints as well as putting it on my 3D models of pottery sold in SL. It's a crowded market so you need soemthing different for it to sell. I also do photos in SL and bring them out into the real world for promo work.