Neat!! I guess they aren't going to like, do anything to your account for using a copyrighted image or anything? I make copyrighted stuff through Cafepress sometimes (the trick is to upload the image and order the product immediately, so that by the time someone gets around to checking if the image is copyrighted, the product has been shipped already). And then quickly remove the image from the account.

Once I uploaded a pic of Cheese to make a shirt but my connection was bad so I had to give up before ordering the shirt, and they caught me.
