Easter egg: On Disc 3 of the Blu-Ray "Extended Collector's Edition", highlight the "Live Extras" and press the down button. This will display a "Theatrical Trailer 3D" and "Pandora Discovered 3D" option. Viewing these requires a 3D-enabled Blu-Ray and TV.
Easter egg: In the two disc set, Disc 2 (Special Features), at the main menu select The Human Factor. Once you are in that part go down to Domestic Destruction, push the right button on the remote and a little icon of the Decepticons will appear. It shows a blooper during one of the big scenes.