One of the more interesting promotional items I've ever gotten came just moments ago. Yes, it's a straitjacket, fresh from Arkham Asylum.
It came in this box, had had a bunch of creepy playing cards. And, oh yes, reviewable builds for PS3 and 360 (seen at right):
Unfortunately for you the embargo doesn't lift until August 21st, so you'll have to wait a while for the final verdict.