Sorry to get into the whole Countdown to wii craze so late but...I made image which updates everu refresh. I know there are cooler clocks like count downs but you can't put those in your sig on most sites. Thus an image that gives the current time at the time the page loads - for signatures mainly. Use it where ever, no bandwidth limits.
You can customize the timezone, image type, and header text on the userbar and larger signature.
Wii Count Down Signatures Until Nintendo USA Launch - diginc.us