Brooklyn-based Casely makes "cute and protective" cases, with a variety of graphic artists behind their designs. They're more affordable than, for example, with the Casely site currently offering while supplies last for (the sale has been on since last week). I found them to be perfectly well built -- they don't seem cheap at all.
I liked some of the samples I got, but the truth is there are plenty more designs that will catch your eye once you hit the site. The cases usually cost $25, but the discount brings the price down to $12.50, or $17.50 for the tougher "bold" version with added drop protection. Shipping is free with orders over $20.