I ran into this Photo Kiosk at Percival, MO right at the Nebraska border. I printed a couple pictures, and they look good enough for 4x6. They also have larger size, but I'm going to print them at home. I'm not sure how the resolution is going to hold up. It is 640x480 after all.
One thing that annoys me is that I need to go across the room to pay at the cashier. The line was long, my memory card was at the machine across the room, and there's no way I can stop somebody from pulling the memory card, thus ruining my pictures. They should move the kiosk to someplace by the cashier, you know? No good putting that halfway across the store.