By Simson L. Garfinkel
Special to The Seattle Times
If you have one of those fancy new wireless Wi-Fi or 802.11(b) cards
in your laptop or handheld computer, you probably know about the
increasing number of "Wi-Fi hot spots" where you can get wireless
Internet access -- often without paying.
What you may not know, experts warn, is that these hot spots can also
use your wireless card to track your movements as you walk around.
Meanwhile, other people using the same hot spots can covertly monitor
all of the information that you send over the air.