this clock, by kibardin design, is very clever. it uses OLED's in each digit, with light sensors that ensure the right colours are always showing. there must be a crossover point between black and white, but i cannot imagine what that would look like. it reminds me of a couple of things, mainly the 3D digital clock by alvin aronson (which i did a post on here, which in turn reminded me of a scene from futurama).
apparantly, the designer is 'searching for a manufacturer'.
link to kibardin design