[adept]

If you haven't tried kismet, you should really give it a try. I especially like how it waits for ARP requests and finds the IP subnet in use.

Also, it seems to store data in a nice format. Somebody should write a php/mysql import script for the format, I may at some point if nobody else does. If you are interested, I can get you a table specification and an example script that imports netstumbler format.