mmmmmm, gadgets:

“This pen is chock full of electronics, and uses an unusual method of capturing handwriting. If you write on paper that is preprinted with a very special information-carrying grid (it looks to us humans like a slightly off-white tint of about 3% gray), the camera behind that transparent window uses the grid to track exactly where the ink is going. In fact, the pen also tracks its angle, it’s velocity, and the pressure applied at any instant, all of which can be very useful for signature capture and validation. But this gets even more interesting — the invisible grid is not just a standard grid, but one whose pattern allows the pen to recognize where in a half-continent-wide virtual sheet of paper it’s currently writing. ”

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