I'm also looking at photo submission guidelines for a lot of different places. They expect a lot, bad news for me The only digital submissions most places accept are from like 11 megapixel camera's. I need a new camera apparently (eventually). I'll continue my search though. At the very least I'll be able to see what these places are asking for, so that I'll be better prepared for those situations.
Also, I don't necessarily have to sell my photo's that I've already taken this way. I can sell them directly, and even maybe use my site to allow people to buy things like puzzles with my work.