Amazon is currently offering bonuses if you pre-order the current gen versions of Transformers: Revenge of the Fallen video game. The offer is a "Generation 1 Ironhide Unlockable" (for Playstation 3 or XBox 360) that repaints movie version of Ironhide in red with yellow touches.
Don't forget that Gamestop is also offering a bonus in the form of gold painted Optimus Prime and Megatron skins and a keychain. I also checked Toys R Us, Best Buy and Target and so far they are not offering any bonuses. That could change at release date however since there are plenty of skin opportunities. It is a shame that Activision doesn't release a master list of their bonus plans so people can make a purchasing choice based on their preferences.