SOmething that you may want to look at is HamWeather (http://www.hamweather.com)
A PHP version is due to be released in November, and would be easy enough to incorporate into GL...
I plan on attempting this once it is released... I had a mod I wrote for MPN a while ago that included the perl version but it was buggy and a security hole

I will post a story on HamWeather(PHP) and GL integration once I get it done

-John