A great tool for spotters, net control operators, and the NWS. That's right, the NWS in Chanhassen is using it too!
With Spotter Network, you can use a gps with your computer and send reports to the NWS. You can also use it with program such as GRLevel3 and Swift Wx. Spotter Network allows you to send real time reports, with accurate locations. Better yet, net control and the NWS can see your location on the radar and match your report with what radar is telling them.
Also, if you use it while mobile, your loved ones can go to spotternetwork.org and see your location.
Spotter Network can also be used with APRS. For more info, go to Spotter Network.