Raven,
I get the impression that the development has moved on from there. The active ingrediant is Will or Emotion, not hand or arm movement. Hard to believe I know, but as with lie detectors each thought has an emotional response and it is the intensity of these that would be measured and transmitted to the cursor. Like Wolfgang Gulke said 'interfacing the microchip with the human nervous system'.
Placing microchips under the skin is in common practice these days with animals. Where I live, pet owners do it with cats and dogs, so they can keep track of them. It's no big deal, is done in a second and is nothing more than a pinprick.
In times to come probably all babies will have microchips implanted at birth, that way they can be monitored 24 hours a day.
gbuilder.
XP2000, 512mb Ram, 64mb GForce4 MX440 Graphics card, WindowsXP Professional.