802.11b in the Yahoo! Directory

NetStumbler
Windows utility for 802.11b-based wireless network auditing.
www.netstumbler.com
Exploiting and Protecting 802.11b Wireless Networks
Article addressing the vulnerabilities of wireless LANs.
www.extremetech.com/article2/0,3973,11388,00.asp
Wireless Network Visualization Project
Uses data collected from walking and/or driving scans, aerial photography, and interpolation techniques to create highly detailed network coverage and signal strength maps.
www.ittc.ku.edu/wlan