One service that Garmin offers as a part of their Eco Route software is a Mileage Report. This program turns your routes into an excel spreadsheet, which can be transferred to your pc and allows for easier mileage reporting for you or your employees.
Larry Liang from US GlobalSat provides an overview of the TR600. It is a vehicle tracking devices with a total of 9 i/os (3 ins, 5 outs, analog and serial). There is a built in accelerometer and GPS. The retail cost will be roughly $300 in around 3 months. Also of note, the TR600 takes12-24volts, powered by a vehicle. The parasitic load is 2mas when it is in stand by mode and when transmitting it only gets as high as 200mas. It can also be used as a stand alone device to control relays in the vehicle as well as be used to wake up more power intensive systems such as a carpc.