Inspired by ClockBlock, BOLL created a Halo clock to keep time for you. If you don't want to keep visiting this page to see it, you can download standalone apps for either Mac or Windows. (Clock is Flash-based, and 650k, so give it a minute to load.)
Download Standalone versions:
Macintosh (1.1mb, stuffed) | Windows (1.1mb, zipped)
Discussion about this clock can be found in our forum.