Just wanted to say hi to Dave and mention his nerd t-shirt store at http://www.nerdkungfu.com .
He's a regular at our weekly Bad Movie Night, and I think a lot of the movies we've screened have shown up as t-shirts on his site a few weeks later. If you're looking for shirts from your favorite old video games, sci-fi movies, or TV shows, you'll probably find them there. I picked up a delightful (if dated) School House Rock Conjunction Junction t-shirt, which I later learned is only meaningful to people within about 5 years of my own age.. guess those after-school specials weren't on TV for very long. His Star Trek collection is pretty impressive too.