My sister (half-sister, same mother, whatever) Megan (who is a graduate student in ceramics) has had a piece accepted for the International Orton Cone Box Show! It's a prestigious travelling 2-year show. All the pieces must be small, no bigger than 3X3X6 inches, and available for sale, valued between $30 and $150. Or something like that. :) This article about the 2004 show will give you an idea how hard it is to get in, and how well-respected the show is.
Here are pictures of the piece that was accepted: