The idea is fascinating, and the code is well designed. However, I don't find this scroll clock to be nearly as attractive as the words only clock that was posted on here about a month ago.
I find that many programmers tend to use OO in javascript for everything they do, even when there is no call for neither inheritance nor multiple instances.
Browser version:
http://www.andreehansson.se/code/wo-clock.html
For Mac OS X Dashboard:
http://experimentgarden.blogspot.com/2009/10/dashboard-text-...