Is the new iPhone a viable GPS unit? I had read that it now has true GPS capability as opposed to the pesudo-GPS that uses WiFi addresses in iPhone 1.0. I also read that TomTom is coming out with a 3d party app for iPhone 2.0. This all seemed great until I read David Pogue's review in today's NY Times, which said:

Unfortunately, there’s not much you can do with the G.P.S. According to Apple, the iPhone’s G.P.S. antenna is much too small to emulate the turn-by-turn navigation of a G.P.S. unit for a vehicle, for example.

Instead, all it can do at this point is track your position as you drive along, representing you as a blue dot sliding along the roads of the map. Even then, the metal of a car or the buildings of Manhattan are often enough to block the iPhone’s view of the sky, leaving it just as confused as you are.