I was! That's the first thing I thought: "I could make a way smaller one of those with a GPS shield on an arduino." http://www.ladyada.net/make/gpsshield/ http

I was! That's the first thing I thought: "I could make a way smaller one of those with a GPS shield on an arduino." http://www.ladyada.net/make/gpsshield/ http://www.ladyada.net/make/gpsshield/ I figure the bulk is in the battery pack. Altho that baffles me, if I was tasked with building one I'd make it splice into to the tail lights power like a cheap tow adapter kit. edit: Damn, I had to add "make a lojack style tracker for my truck" to my project list. Just seems too easy to create something that updates truck location to a private twitter account whenever the engine is started/brakes applied.