Director Michael Bay has posted the Transformers: Revenge of the Fallen footage he presented at ShoWest 2009 on his aptly named official site MichaelBay.com. The footage includes an extended clip of Sam and Bumblebee as well as a montage of robot-on-robot action from the film, including our first look at Devastator.

Hit the HD and Fullscreen buttons for explosions, giant robots fighting and gratuitous shots of Megan Fox running in slow-motion.

ShoWest is an annual film and television convention for the industry.  Transformers: Revenge of the Fallen hits theatres on June 24th.