I want to introduce to you to probably the best Sheldon t-shirt in the universe. There's plenty of Big Bang Theory t-shirts available online, but this design just seems to have that "it" factor. There's just something about it. It's called the Sheldon Live Long and Prosper t-shirt ($19.99), you can score it here at Think Geek for a penny under twenty bucks.
Last featured t-shirt: Storm Trooper Boombox