Google has released its new iOS map SDK for public.
Few quick test and it shows this:
– SDKDemos sometimes freezes when using Satellite/Hybrid map
– no direct support for tile overlays, see also this:
-nice 3D building appear in certain cities
-supports rotation and tilting
-they have created their own API making transition form MapKit not smooth (unlike MapQuest iOS map API that is drop-in replacement for MapKit )
in summary : nice, smooth maps, that sometime freezes whole app. Tested on iPad3