I made my submission for the Alpha Stamps January ATC lottery using an image from Cleo #1 you'll need to scroll down the page a bit to find it.
ATC stands for Artist Trading Card...the only rule is that they must be 2 1/2" by 3 1/2" I frequently have a hard time working on such a small scale and this piece was no exception. I had a very hard time getting the frame the right proportions and actually redid the ATC three times. I think it was worth it.
The lottery works just like a regular lottery. I enter my ATC (that's like paying for a card) and when the end of the month rolls around the names of the participants are placed into a randomiser and someone is pulled. I hope it is me :) if not I mail my ATC off to the winner. If I do win the lottery I will receive all the other ATC entered. Pretty fun way to swap ATC isn't it?