Archibald Ingall Stretton in London built an advergame for the O2 mobile provider that puts you in a staring contest with three rugby players. The exciting part is that the game is able to tell when you blink or look away: "We capture the output of the webcam using BitmapData, using the current and previous frames of data we apply a Difference filter to the two images and then we analyse, pixel by pixel, what has changed."
-- thank you, Geoff.
