Since my last posting on this topic I was trying out TomTom and Navigon for the iPhone 3G. TomTom hardly found a decent GPS signal at all – although Google Maps had no problems at all with the fix I found.
Navigon did a little better but altogether I can not recommend replacing a real navigation system with the iPhone 3G. Not worth the money, in my opinion.
I really hope that the iPone 3GS does better with GPS than the old 3G.
