http://www.joystiq.com/2008/08/15/pe...ret-game-cave/
A room chock full of Sega games, plus a ton of peripherals and some very intriguing items. There's a link to their Flickr page for some hi-res shots on the Sega Blog.
Turns out some guys 'stumbled across it' when they moved Sega's offices.
o_O