Timbuk2 has come out with the canvas artist bag, which you can paint yourself any way you like. It actually has canvas on the outside, which you can prime and paint just as you would a framed canvas. I think it rocks. Except I wish they didn’t have that big spiral logo on them, that’s kind of annoying. Some artists have done some very creative things with these bags, which you can check out on the Timbuk 2 canvas artist bag page.