There's some excellent additional options (including, YES!, black t-shirts) in the "Premium Shop", but that requires a monthly fee and I'm not sure it's a viable option right now. I'm not sure anyone's going to buy anything at all. So why pay for the Premium Shop when I can't even sell anything in the Basic Shop? See, it's a catch 22. If only I could travel into the future and predict the success of the Premium Shop!
Right now, I can't even use any product more than once. So if I wanted to make two different t-shirts, I couldn't! And I have some great ideas. Different t-shirts. Different colors. Bumper stickers. The works! Ah, well.
Raul