Yeah, there's a thread already for that.
http://boards.cityofheroes.com/showthread.php?t=217574
Summary:
-- T-Shirts available online, but not authorized by NC/ParStu.
-- No idea if endorsed or paid placement or what.
-- Not the first time: past episodes in the comic store has City of Heroes swag as well.
This may have already been posted but was watching big bang last monday and notice that in the comic book store had alot of cox stuff on the walls and a guy city of heroes t-shirt on. Is there a secert advertisment going on