DIY USB dongle that causes confusion

Adrian Crenshaw has come up with a new programmable USB device that will identify itself as a USB keyboard, where it can be programmed to do your bidding. It is based on a Teensy board that will feature an ATmega32 chipset which retails for a mere $18. Apart from that, he also threw in a set of DIP switches for easy in-field changes to the firmware. A built-in light sensor can be used to activate a command the moment a victim shuts off the lights in the office and left for the day. Anyone wants to give this project a go with their spare time?