[cypherpunks01]

And if you lose your important WPA key and can't recover it via dictionary attack, there's always reaver-wps: http://code.google.com/p/reaver-wps/

[catch23]

only if they have wps enabled...

[icarus_drowning]

A depressingly large number of recently manufactured routers do, and it is on by default by mandate of the WiFi alliance. If the router is Cisco/Linksys, in many instances you can't disable it, at least as I understand it.