I am have been thinking on these types of slots for awhile, I see them all over and love seeing how artists can push themselves in doing Iron or Bronze artists.
I do know for mine I would be doing small (3"x4.5") watercolor and ink paintings similar to the images below.
http://www.furaffinity.net/view/16297630/
http://www.furaffinity.net/view/14106643/
http://www.furaffinity.net/view/13792095/
http://www.furaffinity.net/view/6934994/
If I were to open for slots like these would there be much interest? Some, minimal, a decent amount?