The Maps app just isn't doing it for me any more, so I've decided I need a new GPS app. Obviously, the big two contenders are TomTom and Navigon, and from what I can see, there really isn't much between them. From what I can understand from this chart, the only real difference is that TomTom offers more for folks with jailbroken iPhones. They are both the same price here in Australia ($99.95). What preferences do you have?