As Kinect hacks go, this one's not going to bowl you over with its technical complexity, but the effect of what it does is quite dramatic. One of Microsoft's sensor-rich, camera-laden Xbox accessories has been repurposed to communicate with a Pufferfish spherical projection display -- via the magic of WPF and openni -- with its motion tracking algorithms serving to control the image on the giant ball. Naturally, the first thing the tweakers behind this mod thought up w