A servo, a little code, and a clock for geeks was born.  What geek could resist reading the time on a large analog meter?  And it's great for clock-watching without being obvious! 

This project actually led to the TAP-28 board.  Cool as this is, it doesn't justify sacrificing a full-featured development board.  The first iteration of the clock used a hand-built perf board circuit but the following copies use TAP-28 boards.  Their low cost, particularly with minimal parts installed on the TAP-28 make these clocks practical.  The two buttons on the TAP-28 provide all the user interface needed to set the clock.

The "production" clocks use an 18F242 with a 20 MHz crystal; the time base is derived from the crystal.

For details, check out these links:

Hack-A-Day Writeup

First Clock Construction Details

Improved Calibration Method Required For Low-Cost Servo

Swordfish Basic Source code and build details can be found at the above links.