@Ray7: This 3D problem is hardly unique to Apple though. Take Flight Simulator X for example: as much as Ultimate Terrain X Europe is a great add-on that immensely improves the accuracy of vector data (roads, railways, waterways, coastlines) for Europe over the default FSX data, it does mess up the A16 to Amsterdam which goes under the taxiways at Schiphol Airport. Instead, it has cars driving over the taxiways (fortunately FSX does not have collision detection between road vehicles and airplanes).
Fair enough, but I still don't think I've seen such scary examples of dodgy rendering as I've seen in Apple's app. It's like swathes of Britain were built by Salvadore Dali.
I don't really care about the messed up 3D (I don't even get the 3D on iPhone 4 anyway). I want maps that can find the places I want to go and give me directions to get there. Apple's maps app does neither for me at the moment.
I haven't had any problems with the directions in my part of the world, but the satellite maps aren't up to much. I do have a film-making friend who's loving the 3D views though. Very good for location-hunting, apparently.