I don't believe they're running Android, and the machines are pretty special purpose, but still similar in concept as far as huge touchscreens go: http://awesometouch.org/
On the hardware side, one of the unfortunate limitations with most large touchscreens in that price range is that they only accept 2 touchpoints. For most applications, that's sufficient, but Martin mentioned that one of his goals is to enable multiple users to simultaneously interact. While the opportunity for that is a bit limited on his Acer screen, the larger screen size alone does make it easier for two users to view the screen simultaneously, and it's easier for them to alternate in usage without passing the screen back and forth.
Also, hail from Lexington!
We've narrowed our focus to indoor map applications. We're still deploying them on giant touchscreens with AwesomeTouch, but have also started a project called BuildingLayer to aggregate & crowdsource maps for the insides of buildings (because people always get http://lostinabuilding.com). And just ask John King from CNN, the only thing better than games on a giant touchscreen are maps!