Isn't that standard practice for including t-shirts with games? I doubt they'd take the time, money, and effort to do "custom orders" for free stuff. They're better off giving you sew-on patches and plastic figurines.
However I wouldn't mind a very nice free Italian silk chiffon scarf printed with little EMP grenades and sticky cams included with my CE copy of SC:C. I need something chic to wrap around my pretty, bald, shaved head while prowling in the dark with Sam.
Oh, and I'm having a most awesome time in the game. Compared to previous SC titles this one is particularly violent (not that I like it any more for that) and gritty, as befits a very, VERY pissed off Sam.