It's too bad that I've already bought one awesome (and overpriced) t-shirt this weekend, because Threadless just came up with one that I think I am required by law to purchase.
I just bought a couple of truly book geeky shirts from Threadless. If you haven't yet discovered the wonderfulness that is Threadless t-shirts, now would be a good time since they're having a $10 sale now through December 16th.