When I pre-ordered the game at the start of this week, the Gamestop at Metrocenter (a mall in north Phoenix) did not have the inFAMOUS demo. So, the guy gave me demo for Fight Night Round 4.
Today when I came in to pay off my pre-order (and pick up Mirror's Edge), the guy gave me the demo because they received more. I received some pretty cool swag (2 demos+Gigawatts blades power) when I just want to get my copy of the game (hassle-free).
In my opinion, the best swag I received for a game was the Collector's Edition DVD of The Thing which was part of the pre-order bonus from Gamestop.