Radar loop of the current weather in your area.
Live Wallpaper showing an animated radar loop from NOAA. After installing, go to the Live Wallpaper settings and select it from the list.
A complete list of cities and a FAQ is on the website.
Doesn't work with Samsung Moment, Droid Eris, or HTC Hero
Also, "Ground clutter" will sometimes show as rain when it isn't.