zakzor, madbiologist: thank you both for your suggestions (wmgui and updated GNOME 3.1.2). In the specific case of the pairing code, this is apparently:
http://wiibrew.org/wiki/Wiimote#Bluetooth_Pairing
(a) The host MAC address, backwards (if pairing with battery button) (b) The wiimote MAC address, backwards (if pairing with (1)+(2) buttons)
zakzor, madbiologist: thank you both for your suggestions (wmgui and updated GNOME 3.1.2). In the specific case of the pairing code, this is apparently:
http:// wiibrew. org/wiki/ Wiimote# Bluetooth_ Pairing
(a) The host MAC address, backwards (if pairing with battery button)
(b) The wiimote MAC address, backwards (if pairing with (1)+(2) buttons)