I used to use Weather Panel until the developer went AWOL. There is a very active group using PocketWeather and the new version (2.0) came out last week. 2.0 support scripting very similar to WeatherPanel.
Take a look at the discussion:
http://forums.sbsh.net/index.php?showforum=78
There are people here who spend their waking hours scripting this program....
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Sprint: G1000, HTC-6600, 6800, TP2 now Optimus S with Stock Android 2.2.2.