With all the Apple tablet talk these days, it'd be OK to lose sight of the fact that the company's been there before with the Newton. Seen here is a rare "Batmobile" prototype of that now defunct PDA.
From Flickr user and Batmobile owner splorp, we learn that the Batmobile was a pre-lease model of the Apple MessagePad (related to the Newton platform). Sadly, this particular unit does not work, and may have never worked, having been a "technical sample only." [Flickr]