Johnny Lee a PhD. Graduate student at Carnegie Mellon University in the Human-Computer Interaction Institute.:

Since the Wiimote can track sources of infrared (IR) light, you can track pens that have an IR led in the tip. By pointing a wiimote at a projection screen or LCD display, you can create very low-cost interactive whiteboards or tablet displays. Since the Wiimote can track upto 4 points, up to 4 pens can be used. It also works great with rear-projected displays.

An improved version of Johnny Lee’s original whiteboard demo is described in the following book:

• Where Good Ideas Come From
• When Ideas Have Sex
• UI Platforms: Which One Would You Pick?
• Simplicity by Design: History of the London Tube Map
• Shu Ha Ri: The Stages of Learning to Mastery