Don't know how to do it. I.e. I don't have a "means of production," — so with Zazzle I just create the design and they sell it.

What I'd really like to see, of course, is a few good designs sold through an Ethereum contract. I.e., send X amount of ETH to (address), with a shipping address in the data field, and then... viola! A t-shirt is sent out.

Not totally sure how to code that up though. And again... the physical t-shirts. Need a way to produce them, and manage order fulfillment.