sorry related but not to the T shirt - check out what Hema have done with their site marketing - best bit of online marketing i have seen recently (i work in this area).
Take a look at HEMA's product page. You can't order anything and it's in
Dutch, but just wait a couple of seconds and watch what happens after the page has fully loaded.
This company has a sense of humor and a great computer programmer.
http://producten.hema.nl/
Have your sound on.