snydeq writes "Fatal Exception's Neil McAllister takes Microsoft's recently released Touchless SDK for a test spin, controlling his Asus Eee PC 901 with a Roma tomato. The Touchless SDK is a set of .Net components that can be used to simulate the gestural interfaces of devices like the iPhone in thin air — using an ordinary USB Webcam. Although McAllister was able to draw, scroll, and play a rudimentary game with his tomato, the SDK still has some kinks to work out. 'For starters, its marker-location algorithm is very much keyed to color,' he writes. 'That's probably an efficient way to identify contrasting shapes, but color response varies by camera and is heavily influenced by ambient light conditions.' Moreover, the detection routine soaked up 64 percent of McAllister's 1.6GHz Atom CPU, with the video from the Webcam soon developing a few seconds' lag that made controlling onscreen cursors challenging. Project developer Mike Wasserman offers a video demo of the technology."