That looks to be a custom job. It's just a single png file that shows each state for a number (and the flipping stages as well) then JavaScript is used to slide the image around so each piece is shown. Just a CSS sprite technique. Wouldn't be that hard to create, just a normal countdown with just updating the image more frequently. It's a good implementation though, I thought it was Flash at first. I don't have the time to throw a script together though, but maybe someone else will or point out one that's similar. I'm sure a quick Google search would turn something good up pretty easily.