I am looking to purchase the i900 and debating whether to go for mobile internet or not for an extra £150 for 18 months. I would not be using mobile internet much but only for google maps when im out and about. It would be cheaper to purchase the TomTom NAVIGATOR 6 Software & Maps of Western Europe DVD and slap it in. However, does the TT thing require internet connection? or any other costs to make it run to its full potential?