Just ran across this on the WotC website. Some nice shirts, I think the Drizzt one is funny. :)
D&D T-Shirts (http://www.jinx.com/scripts/products.asp?affid=45)
This (http://www.cafepress.com/kenzerco.42851157) is the gaming shirt I want.
My wife wears this: http://www.thinkgeek.com/tshirts/ladies/5981/
I have this one: http://www.thinkgeek.com/tshirts/gaming/760d/
And I have a plain red tee shirt that I used one of those print-and-iron-on avery craft thingies to make the letters "NPC" on :D
If I was going to wear a RPG-related T-shirt, it would probably be this (http://www.cafepress.com/orderofthestick.10298314).
The most valuable thing I lurned in middle school was to blend in with the rest of society -- at least in appearance. The only logo t-shirts I own are for industrial or metal bands.
Only way I'd wear a gamer shirt is if someone bought it for me and then paid me to wear it. :p