Hi all, After being inspired by Johnny Lee's TED Talk on YouTube, I began working on an IR Pen of sorts. I didn't actually us a pen, but an LED Flashlight by Princeton Tec (the Pulsar). It is a little finger pinch style LED flashlight. I popped open the case and replaced the white LED with an Infrared LED from Radio shack. The flashlight coast about 7 dollars, and the LED from Radio shack was 2 dollars. No soldering, resistors or custom case work required. Attached are pictures of products. I have not tried it with the wiimote yet. I will be as soon as I get home and then posting the results.
David