Wi-Fi is a very handy way to set up a network without spreading cables all through your house or business, and it is much easier and cheaper to set up than just a few years ago.  It also opens you up to a few vulnerabilities that are not always understood.  CNET reports on some of the most common, from packet sniffers, to the fact that when your PC starts up, it broadcasts a list of the wireless networks it has connected to in the past.
“Soon after a computer powers up, it starts looking for wireless networks and network services. Even if the wireless hardware is then shut-off, a snoop may already have caught interesting data. Much more information can be plucked out of the air if the computer is connected to an access point, in particular an access point without security.”

Here is some more Tech News from around the web:

Tech Talk