Happy Easter. "A virtual Easter egg is a hidden message or feature in an object such as a movie, book, CD, DVD, computer program, or video game" (wiki). The image above is an alternative splash screen for Photoshop 6.0 that you can summon (in all other versions, too, I think) by holding alt+ctrl on PC or command on Mac and go to Help > About Photoshop in the menu. The special thanks to the customer at the end of the credits scroll is a very nice touch; hold Alt to speed up the scrolling (via Crestock who has more). More Easter eggs on eegs.com and eggsheaven.com; their lists include games, DVDs, operating systems, productivity software, mobile devices, websites. Here's a hidden page on Amazon that can only be accessed from the All Stores Directory by clicking an invisible link on the very bottom under 1996 (via). Also, check out this Easter game from Google.
These Easter eggs are like getting flowers all of a sudden. We need more of those.