I think this might be the best Video Game Apparel store ever.
By ravensword 23 Comments
http://www.splitreason.com/
Not sure how well known this place is, but I heard about it on a episode of Talkradar and I gotta say, these are some of the best gaming related shirts ive ever seen. heres some examples of the shirt designs:
and heres some great nongame related stuff they have
(I think this is my Fav. one) 
Seriously, I can spend like a crap ton of money here. Where do you get your gaming apparel at?