Google has released an iPhone version of Google Earth.
Google Earth for iPhone lets users browse and search around the globe, finding locations such as businesses and other points of interest. Google Earth is fully adapted for the iPhone's controls, allowing users to pinch to zoom and swipe their way around the globe.
While Google Earth for the iPhone doesn't have all the features of the Mac and PC versions, additional layers of information allow users to view Wikipedia articles on certain locations and geo-located photos from Panoramio. Google Earth is a free download from the App Store, and requires an iPhone or iPod Touch with version 2.0 or later.