This Arduino Steampunk Analog Watch that Matthew Garten built looks fun to use. The video below shows the unit in action with the Biopunk Edition enclosure. I think that the Steampunk version (pictured above) looks much better myself though.  There is no shortage of functions either, you can play some games in your downtime.

Thanks for the tip Greg.

“The materials used in making the watch are

Electronics
1 Arduino Mini Pro 328 – 3.3V/8MHz available at SparkFun
1 FTDI Basic Breakout (if you don’t have one) available at SparkFun
1 4D Systems OLED Module 1.5″ (128×128 pixels) available at SparkFun
1 Blackberry Trackballer Breakout available at SparkFun (I’m sensing a theme of the supplier)
1 3.7V 1000mAh Li-Polymer battery available at SparkFun
1 LiPoly Fast Charger available at SparkFun
1 DS1307 Real-time clock available at Digi-Key
1 Crystal 32kHz available at SparkFun“