They do, but Fox5's suggestion was to have Bluetooth in the nunchucks and wiimotes so they didn't have to be physically connected to each other, to communicate with the Wii.
Ah, I swear I read the whole thread . That would be cool, but you would run out of slots (as noted). Slightly OT: is there a way to get two bluetooth base stations to talk to one another (effectively increasing the device number to 14)?