CSS3 Flip Clock Look
lukesbeard.com
lukesbeard.com
It doesn't change. There is no slick transform of the flipping numbers, just a static display. But it is pretty.
(In a related, but not interesting enough to post, bit of geekery. On Apple's home page you will see a "billionth app" counter. They drive it from a triple of ( timestamp, basecount, rate) so it updates in real time, but once in a while (hourly?) they resync it to the actual number and rate. Nice compromise between accuracy and server resources.)
Animation by sliding a long narrow image in discrete steps. They have reinvented the motion picture projector.