I just got my first "test" shirt in the mail from Zazzle, and I love it. I have the one with the big star on the front. As you can see, I'm trying out a Zazzle widget in the sidebar that lets me display the shirts on this blog.
My friend Brad Thompson is the designer - if you want to check out any of his other stuff, click HERE. My personal favorite is the Boutros Boutros Boutros Boutras Ghali hipster T.