The Google Earth application is currently available in the app store for free.
The app allows iPhone and iPod touch owners to whizz around the globe four controls in the corners of the screen: search, compass, information and location buttons.
Like its desktop counterpart, Google Earth for iPhone lets you browse and search around the globe, finding locations such as businesses and other points of interest.
The app also takes advantage of the iPhone’s location features, so you can quickly jump to your current location or easily search for results near you.
It's not the smoothest experience over a 3G connection, taking a minute or more to load in the satellite imagery, but for anybody who likes a little eye candy on their iPhone it's a novel experience.
Google Earth is available from the iTunes apps store.