Wigle: It's for finding hotspots
So, if everyone's out there collecting all of this wardriving data, they have to be sharing it somewhere, where?
One of the sites that supports users to upload their netstumbler (and other sniffing tools) logs to is Wigle. Wigle then takes that data and compares it to their existing data, using it to correct existing hotspots and place new ones onto the map. You can perform searches by SSID, address, state, metro, etc.
Links:
The Wigle homepage,
http://www.wigle.netKansas City metro area on
Wigle maps