If you still start your car with your car keys, Viper SmartStart ($300-$500) is a cool new system that allows you start your car with your iPhone or iPod touch. Using a GSM signal, SmartStart either plugs into your existing Viper security/remote start system or comes bundled with one, letting you not only start but also lock or unlock the car, arm or unarm the alarm, open the trunk, and activate the panic mode, no matter how far away you might be from your vehicle.
