Once you install the plug-in, you could experience most of the things that appear in Google Earth. Moreover, Google releases new Google Earth API (Application Program Interface) such that developer can now modify how you interact with the site. Google provides some demos to show off what developer can do with the API....
You could use the tradition Google Earth interface: code.google.com
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By the way, I just delivered milk to the tip of the world. (According to wikipedia - Coordinates 27°59′17″N 86°55′31″E / 27.98806, 86.92528)