LIke the regular Woot! site, Shirt.woot! is a site that sells only one t-shirt at a time; 24 hours per shirt, then they post a new one. Today's shirt is called "Jimmy Is That You?" and has a Trowa-pumpkin in it. Check it out:
http://shirt.woot.com/friends.aspx?k=6385 Seriously, that's the first thing I thought. Still a GW geek after all these years.