Jealous of the way those hipper-than-thou ZipCar people are always unlocking the doors to their rented Minis with an iPhone? We aren't either. But if you are looking to recreate that scenario with your Dodge Dart, have we got a gadget for you! If you already own a compatible Viper security system, the SmartStart module will let lock and unlock your car, arm and disarm your car alarm, pop the trunk, or fire off that panic alarm -- all from your cherished handset. There are two modules available, priced at $299 and $499, depending on which Viper system you've installed. You also need a SmartStart account which will run you $29 a year (the first year's free). But don't tak
