Need to keep tabs on your kids, business partners, or, as Uncrater Mike puts it, your "cheating whore of a wife"? Then check out the Livewire FastTrac GPS Tracker ($400). This svelte tracker uses a built-in GSM/GPRS connection to constantly stream location data provided by the built-in GPS. Its real-time tracking updates as often as once every second, and info can be accessed via an online interface accessible from nearly any internet-capable device. Excellent. [Thanks, Mike]
Want to get more diagnostic info than your car's built-in computer provides? Check out the Car Chip Pro ($120). This deceivingly-simple gadget plugs directly into your auto's OBDII port, recording all sorts of data about your car's performance, your driving styles, and more. When you're ready to review, simply unplug the dongle and connect it to your PC via USB to extract the data. No greasy car repairman required.