From the disc's main menu go to the 'Cast and Crew Biographies.' In the biographies of actors Tim Allen, Sigourney Weaver, Alan Rickman, Tony Shaloub, Daryl Mitchell and Sam Rockwell you will find small buttons that you can highlight using your remote. If you press 'Enter' they will reveal some interview clips with the star talking about the movie. You can find the same buttons in the biographies of director Dean Parisot and the movie's Creature Effects crew.
All easter eggs were generously submitted by Satelk