Here’s one for you weary road travelers who use your iPhone 3GS as your main navigation device while driving. TomTom has introduced a car kit for the iPhone 3GS in the UK Apple Store and it’s available for pre-order. It will run you £100 along with an up to a three week wait before shipping gets underway. For that price, you get the TomTom navigation app for your iPhone 3GS or 3G and a docking kit to keep your iPhone secure on your dashboard or windshield.