As I was looking around the interweb for wireless networking info I stumbled onto a program called Vistumbler and seeing as I had a GPSr (2 in fact) I downloaded it. Later in the day I had to run an errand and took the lappity top box with the GPSr (Magellan Triton) hooked to it by USB cable, put it in the backseat so I wouldn't be distracted) started up the program and went about my business. When I got to my location I saved the database. I did the same on the return trip. When I got back inside I checked the results. What this thing did was log every wireless network that I passed that the laptop wireless adapter picked up with a lot of info including my location when the signal was received. Then I could send the database to Google Earth and see my track along with the access points (photo attached showing the first trip). I know that something like this has the potential for helping out hackers but they probably know about it anyway and it's an awfully neat thing to be able to do.
I kind of got tired of Geocaching after 10 finds and this will keep me entertained for a few weeks. I haven't tried it with the Garmin eTrex Legend yet but there may be a problem getting it to talk with the program due to the format of the serial data.