KWAPT (who else) passed along this little tidbit... it's the new shirt you'll see being sold outside the Garden by the folks at the Boston Sports Co. They're the same people (I think) behind the LeBron "Nope" shirts that were sold during the playoffs.
Of course, if you just can't wait to have a Shaq shirt, can I interest you in one of the "Got Diesel?" shirts in the Red's Army store?