I find Google's techie Easter-eggs like this delightful.
My favorite, by far is: http://www.google.com/#q=recursion
My favorite, by far is: http://www.google.com/#q=recursion
Edit: found the original interview:
http://www.npr.org/2003/10/14/167643282/google-founders-larr...
Starting at 13:45, Sergey and Larry try to explain recursion and idempotentence on Fresh Air.