Go ahead, search Google using Chrome for [a long time ago in a galaxy far far away] and you will get one of their coolest search user interface easter eggs.
Google will change the search results page from it’s white background with blue links to a black background, with yellow font, that scrolls like a movie credits. Oh, and click the sound button on the right to listen to the Star Wars theme music.
Here is a video capture of it in action:
Here are some older easter eggs from Google that also rock:
Easter Egg: Google’s Search Results In 1998
Atari Breakout: Google Image Search Easter Egg
Google Super Mario Bros. & Score Coins
Google Maps: One Does Not Simply Walk Into Mordor
Google Marquee HTML For Scrolling Results Count
Google Easter Egg: Up, Up, Down, Down, Left, Right, Left, Right
Try Searching Google For [Do A…]
New Google Easter Egg: Blink HTML
Google Typography Kerning & See A Fun Subtle Easter Egg
Google Easter Egg For Bletchley Park
Google Teapot Easter Egg Uses Mobile Gyroscope
Google Easter Egg: “When Am I”
Google’s Special Treat For The Qingming Festival
Conway’s Game of Life On Google
Google’s Let It Snow Hack
Google’s Blink HTML Trick Works On Query Refinements
Defend Your Google Search Results: Zerg Rush
Forum discussion at Google+.