Even better is the fact that he was able to use the Wiimote without the sensor bar; instead he used two regular remote controls to throw out the IR signal for the Wiimote to pick up.

It seems that the Wii's sensor bar isn't entirely necessary to use the Wii remote's pointer functionality. An intrepid Wii user has posted an online video showing intermittent pointer reception ...

The video demonstrates that the Wii ‘sensor bar’ is just an array of IR leds. The actual sensor is in the remote control – which probably sends data to the Wii via RF.