To accomplish this, Google is taking advantage of browser technologies (like AJAX) that made Gmail and Google Maps possible on the desktop. In supporting these advances in web technology, the iPhone's Safari browser not only delivers an excellent mobile Internet experience; it enabled our product and engineering teams to create an optimal Google experience on a mobile device.
Google's overall goal is to provide users with access to information, wherever they are. This commitment is device-independent, and we are working to develop new mobile technologies that are faster, easier to use, and available on more devices. A recent example is My Location (http://google.com/gmm/mylocation.html), a Google Maps for mobile feature that shows users their location directly on the map with or without GPS. To see the full range of mobile products and services available from Google, visit http://mobile.google.com.
(Image Source: Macrumors)