Nice work.. This is exactly what I've been working towards also!!
I have seen LowJack at work and it really makes me want to add GPS reporting to my CarPC.. It's one thing to limit the RPM of my car when I hand it over to my mechanic/tire shop/alignment expert, it's another all together to see where he drove it to put the 1.8km extra I find on it when I pick it up.
So anytime you need a beta tester (in Canada even!) just let me know. I'm currently running a USB BU303 but looking to upgrade. I'm using windows xp (tablet edition) and my uplink would be TCP/IP.
Great work!