Wikitude Drive from Mobilizy is the first augmented reality turn-by-turn navigation app. It has been especially designed for the Android phone, having OS version 1.6 to the minimum. With this newly envisioned app you just wont have to listen to a voice or look at the maps. Making use of the GPS receiver and the camera of the phone, the app will layer the selected route over a live view of the things that is ahead of the car.

It could be that the virtue of Android running more than one app, will allow you to use voice activation, receive and make phone calls even while using the navigation app. It could be little risky, but may be your virtue of multi-tasking will help here.