I'm also in IT and configure all the WiFi for our entire network. I got handed the WiFi stuff when a user next door called and told us the names of our servers he could see. Anyway, 128bit WEP is strong enough to keep 99% of the people out. The other 1% probably won't bother unless your a multi-millionaire or something. It does create a little overhead adding the encryption to the packets, but worth it unless you want someone sucking up your bandwidth. I got a neat tool at work, a Fluke Wireless Tester, amazing how many access points are out there.
