I have been using a Linksys Instant Wireless Card, but I would like to get a Cisco Aironet card. The Netstumbler forums are a good source of information. I posted a link below that might help you start "Stumblin."

http://forums.netstumbler.com/showth...&threadid=1797

Have fun! I hope that you don't have any rogue APs. They can be a real problem.