Found a pretty cool in-car GPS tracking deivce. Works really well, it's basically it's a Boost Mobile Phone with a built in GPS chip. You place the phone in your car, or backpack, or wherever, and it tracks your location in real time. The GPS chip inside the phone gets your coordinates, and uploads them to this website. You log into the website, and view in real time your location via the Google Maps interface. Abuot a hundred bucks, and six bucks a month for the service.
They also have a very cool geofence feature. If your vehicle travels outside of a predetermined area, your personal cell phone or email address gets a special alert message.
http://www.accutracking.com/starterkit.html