It's the 30th anniversary of the arcade classic Pac-Man, one of my all-time favorite computer games.
Apparently, Google agrees, so they celebrate it with a playable (that's right) Google logo: Today, Google is most certainly distracting more people from work than Facebook.
This is awesome. Make sure to try it out before the end of the day!
(If you missed it, I am confident it'll show up in the Google's doodle gallery soon.)
Update: Tobias and JP point out the Google's Pacman logo now has a permanent residence on the web. Great!