Using an analog display to show your PC's various statistics seems to be a fairly popular modification right now.
One such example of using an analog display was carried out by programmer and hobbyist electrician Cristiano Cesaretto. He grabbed a cheap old tachometer, usually used to display a car's engine revs, from eBay and then modded it to display his PC's CPU usage via a USB cable.
Check out the completed modification in action:
[Via Hack A Day]