I don't know what WEP is, sicne I'm brand spanking new to wireless. I do, however, have most things on my iBook password protected, which helps, and was planning to add an encryption system built into OS X.
I did want to wait, though, since a neighbor was curious how easy it would be to hack into a wireless mac network with and without firewall, and all that stuff. I've got the stuff, so I want to see what this wizkid, computer networking major can pull off.