It looks like a simple enough project (now that someone else has written all the code): just tape a Wiimote to the sort of USB missile launcher found at ThinkGeek (for example), connect the Wiimote to your computer using Bluetooth, and use the GlovePIE code found in the tutorial. Your turret will then aim at any IR light source! It's at your discretion whether or not to pelt that light source with foam darts.
[Via Engadget]
