BBC NEWS | Technology | Wi-fi nets get security makeover
...Problems with the original encryption system built in to the wi-fi specifications, called Wired Equivalent Privacy, made it possible for patient hackers to work out the keys used to scramble data being sent through the air.This original security system was replaced by an interim technology called Wi-fi Protected Access (WPA) which has now also been updated.
WPA2 uses a US government-approved encryption system to scramble data and also does a more rigorous job of checking that people who want to use a wireless net have permission to do so.
At last WPA2 makes its appearance. Let's hope its soon in equipment. I certainly could do with upgrading when I get chance.