Our North American pals are getting what are called pre-order 'bonuses' for inFamous 2 in the form of different super-powers from different retailers.
That's right, depending on who you buy the game from, your game powers will be different. Sort of like buying a CD (don't laugh) from Smiths and getting a different first track than you would if you bought from Morrisons.
Walmart get you the Electrocution Grenade. Amazon's gets you a 24k Gold Amp. GameStop gets you the Lightning Hook.
Videos of them all are below. We'd imagine that the Game of the Year Edition will have all the powers... or you might have to pay for the pair you missed as DLC. But that is speculation of course.