Wow, this is brilliant. It would be awesome if in a few years, there was a standardized way to have "car applications" for various purposes (i.e. fuel economy tracker, Grooveshark in the car, a media player, so on and so fourth... the possibilities are endless). I'm curious to see if any other auto manufacturers would be willing to implement this standard, but I'm pretty hopeful as this appears to use a standard OBD-II port.
Ford has always been good in the technical areas (I recall they wanted to be one of the first automobile manufacturers to totally get rid of CD players, instead replacing them with USB ports), and seeing this makes me even more proud to own one :)