I'm always surprised I've never heard anything about the similar room at Facebook's old California ave. hq. There was a secret door in the basement to a small "situation room" type place.
Edit: Here is the photo: http://www.flickr.com/photos/scobleizer/5179450270/
Scoble calls it the War Room but I presume it's the same place. More here: http://www.flickr.com/photos/scobleizer/tags/facebook/