Where these terrorist not living in the UK at the time? If so, how come the UK government provided a safe haven for them to operate and discuss their plans?
I have been using WPA-PSK at home on the *nix machines I have. wpa_supplicant works wonders with the Atheros card and for the Ralink RT2500 I just use iwpriv to setup the interface to use WPA-PSK in/etc/network/interfaces.