http://www.musatcha.com/computers/software/wifimapping/
Features:
Downloads data from WiGLE
Loads WiGLE mappacks as well as others
Client to Kismet
Can get GPS data directly from a GPS or via Netstumbler
Supports 255 GPS units simultaneously
Color coded APs by either channel, WEP, data source, etc...
Data Sheet for viewing details on all networks
Can channel hop a linksys wap54g and wrt54g. Wardrive with linksys gear! (This works extremely well because you can use nice heavy coax sraight off the back of the wap, and you've got kismet in win32)
Imports and Exports various formats
Plots waypoints and geocaches
Battery Meter
Magnifier when viewing maps
Voice Command Support built in!
Speech output built in!
Can automatically check for newer versions
Printing support (though may be slightly broken right now, I'm fixing it)
If anybody has any feature requests or bug reports and the like, feel free to post 'em on the forum at http://www.musatcha.com, or e-mail me at brad@musatcha.com. You name it, I'll (attempt to) code it.
Note that this software is still in the alpha stages. If you find something not finished yet, let me know as I may have forgotten about it, lol. I get a bit disorganized at times.

