I originally posted this in another thread but i want direct commenting on this so i moved it:
ALSO:Originally Posted by Fierce Deity
There is a special port for the sensor bar.
There is only one port so that means only one sensor bar per console.
NateTheGreat posted a thread that showed an article from IGN.com about the Wii Remote and it satate taht you would have to callibrate the remote but for porposes not discussed below in this thread.