Why do they bother?!
'The iPhone, launching in the US on 29 June, will incorporate search and mapping technology from Google and allow for calls to be made directly from Google Maps.'
As does my N95, and indeed any other phone that has the Google Maps application installed.
Hardly a killer app if everyone can already get it for free anyway on other mobile platforms.
Except of course that unlike the other platforms, on the iPhone you can't install 3rd party apps!