I'm not a fan of WPA or WEP on these low end routers such as Linksys, Netgear, or D-Link. The problem is that most of these devices use software (firmware) encryption which hampers the performance of the device. I prefer to use to MAC authentication and with my SSID broadcast turned off. I've also seen in the past that WPA or WEP does cause problems with some devices regarding DHCP; could be Nokia's problem or the AP's problem.

Sure without WEP or WPA, someone could sniff my packets, but I'm not overly concerned with that. They are not going to easily be able to connect to my wi-fi and use it. Sure they could just change their MAC, but then I'll get MAC conflicts on my machines and will know something is up, too much of a headache for the wi-fi road warrior.