I'm designing up some t-shirts

I've been waiting for someone else to come out with some Versa t-shirts for the last year and am still waiting. I'm playing around in Photoshop this afternoon trying some ideas out.

If you have some ideas for shirts, post them up. Anything I come up with will be for sale on Cafe Press for as cheap as possible. I'm not going to do batch orders, minimum buys, etc.