With all the stories over the last few years about bands of all levels having their gear stolen while on tour this article immediately struck me as something that could really be handy for gigging musicians. So, I figured I'd post it here.
Arduino-based Moving Truck Alarm System
you can buy tracking devices for your gear now too, Strictly 7 sells them as an option. you have to be registered and pay a annual/monthly fee, but you can reactivate any time and find out where it is
i like the thought of showing up at some douche bags house and be like, gimme my gear, or i hurt you