This one's for geology geeks and gelatin fans only: Wiglet is a great little desktop widget for Yahoo! Widget Engine. It looks like a green Jell-o mold, and when USGS reports an earthquake it will jiggle with a velocity corresponding to the magnitude of the earthquake. When Wiglet reports an earthquake, you can click on it to see a map of the affected area. How cool is that? Oh, and it's free.