I was tinkering last night and wrote a short program that will read gpsd and then go out on the net and get the weather from noaa based on that info. I wrote it in python and wxpython and I think it also needs python-gps. I haven't done too much testing, and the code is very crude and doesn't do a lot of error checking. If you feel like giving it a shot you can get the file from this post on my site get weather based on gps location for your carpc