Easter egg: (Blu-ray) On Disk 1, open the "Extras" submenu and highlight "BD-Live". Press the Right arrow/button and a wire-frame of Iron Man will appear below it. Press the Enter button and a brief behind-the-scene vignette between Stan Lee and Robert Downey Jr. will appear.
Easter egg: Go to the page for scenes 13-16. After you wait for a while,(Note: a lot of patience is required to find this) a 17th scene will appear. Click on it and it will take you to a page with secret military files. Unfortunately, only three of them actually work. Only time will tell how to access the other ones.
Easter egg: On disc 1 of the Special Edition set (the feature movie), on the main menu, the circle with the W and the 214 value (which changes) is a link to a short animation test clip. (I could only get to it on my computer, not my DVD player).