IR LED pen schematic and IR keychain lights

I've uploaded a simple schematic of the IR LED pen I used. If you use a good LED, you can probably run it safely directly off a 1.5v AAA battery without a resistor. I used Vishay TSAL6100 940nm IR LEDs running at 100mA which I bought from Mouser. But, you can find usable LEDs and everything else you need from RadioShack. A number of people have also written in saying that some places sell IR keychain lights which may work right out of the box. NOTE: If you rough up the end of your LEDs, they will be more omni-directional and more easily seen by the wiimote.