"While Wi-Fi fans around the country prepared for the WWWD, Wired News
joined SoCalWUG co-founders Outmesguine and Frank Keeney for a war driving
excursion from Los Angeles' Chinatown through the city's financial core. In
just 40 minutes, we logged nearly 400 access points, and many were
unsecured. Software on Keeney's laptop allowed us to view some of the actual
contents of network traffic, revealing detail as precise as file names and
user names."
More:
http://wired.com/news/wireless/0,1382,59460,00.html