Griffin has released a new version of its iTrip Auto FM Transmitter for the iPhone and iPhone 3G. Functionally identical to the updated iTrip Auto released in September, iTrip Auto for iPhone employs a one-cable design combining a FM transmitter and auto charger, featuring an in-line control box with a backlit LCD screen, SmartScan automatic FM frequency-finder button, four presets, and tuning buttons, and a charging stem with power switch and a three-color…