What do you do if your regular whiteboard isn't going to cut it? What does it take to entice smart students to attend a recruiting tech talk? Well, a rear-projection, autocalibrating, physics-enabled whiteboard, of course. Vikas and Jeff prototyped this whiteboard in a tiny apartment in NYC, March 2008, demoed it at an HKN Tech Talk, recorded the "TechStars Tumbler," and promptly mothballed it for the hike from NYC to Boulder, CO.