I am sorry but we do not offer any API to get data from WIndguru for other applications. And we do not like to see scripts that try to dig out info from the website, it is actually forbidden (see terms and conditions). Please contact me by mail (vh@windguru.cz) with more info about what you need and we'll see what we could do for you.
I'm a traveller and want to query weather (and archive it) of my current position (gps coordinates) in a way similar to weather undeground [1].
Sadly wunderground is not very precise on some locations (get a weather station more than 100km away ...) so I try windguru.