Locked within this 1977 Jawa Sandcrawler is a Gamecube, an N64, and an Atari 2600. They call it the Jawa Gamecrawler. I call it frickin' sweet. Everything from controller ports to cartirdge slots are hidden within the design of the crawler. More details and pictures are available here, as well as elsewhere on their website.
They have one other project that I thought was kinda cute, too. They've hacked a Dreamcast into a Fisher Price Millenium Falcon which can be seen here. For more on what they're up to, visit DarkOps website.