Got quite into T-shirts recently i have orderd loads from these guys www.threadless.com it has a really good community angle where people submit graphics and everyone votes for them to get made into t-shirts.

get on , get some t-shirts printed and get involved with the voting !

Its worth signing up for the news letter which comes out (i think monthly )with all the new t-shirts to give you a chance of gettting them . note they sell out of stock very quickly.