Here's another cool use for your GPSr. War Driving is basically using a WiFi equipped laptop (or PDA) with GPSr attached to locate and map WiFi signals ("Hot Spots").

War Chalking is an off-shoot, where folks chalk symbols on the sidewalks near "hot spots" to show others that free wireless is available.

One quick drive through most any town with a WiFi equipped device will quickly prove to you that you should have WEP (Wired Equivalent Protection--a wireless encryption scheme or MAC address filtering) enabled if you have a wireless router in your home or business.

www.wardriving.com

Here's a link to download "NetStumbler"--THE WiFi finder of choice (for most wireless cards).

http://www.netstumbler.com

I haven't yet made the connection between the WiFI and the GPS - I've found a couple of hot spots, but not sure where the use of the GPS comes in.

Suggestions?

Check this site for an example of the end result of Wardriving:

http://www.wifimaps.com/

NetStumbler will interface with a GPSr and will create a log of hot spots, including coordinates. You can then upload the logs to website such as the one above.