With wardriving and Netstumbler, if you use a GPS it logs the GPS coordinates to log and you can either use the eported logs to import the data into a mapping program. I am using Microsoft Map Point 2004 to actually draw the maps and display in realtime the routes taken and AP's found, check out the forums at http://www.netstumbler.com and you can find just about everything you need to know.
I am just using the built in wireless card in my notebook with no external wireless antenna, as money and time permits, I hope to setup and external antenna to be able to detect yet more. I found in one residental area, and entire street about a mile long was an entire mesh of wireless access point, home broadband networking is becoming so comman now with the cheap cost of AP's
Also should note that I disable the MS networking and zero effortless network function in WinXP on my notebook to prevent unententional access to others networks; from just what I have seen so far in my area, 80% of home networks are wide open and from my perspective, there is no way I would want to get a virus from just driving by a open network which is very possible. It's mind boggling how many home networks are wide open!! Also there are some legal issues involving the fact that even if someone leaves their network open and you access it, you can be found guilty of tresspassing even if it was accidental; kinda like hacking TV satelite signals, just becasue they are in your backyard doesn't mean you can receive them if you know how.
One strange thing which I going to check out is that when this GPS receiver is powered up, my Win XP mistakes it as some sort of Microsoft serial mouse and from time to time causes my mouse to freak out, I goingto research that problem today
