Google is not just an innovator in search or advertising, both huge in their own right, but also will become known as a leader in applications, communications, and energy.
This is the greatest company since Thomas Edison single-handedly invented our biggest industries: electrical power (GE), movies (MGM, NBC, Universal, Disney, etc...), and music (EMI, Sirius, etc...). The big difference between Edison and Google's Founders, is the Google founders have been able to keep the economics of the industries they create, whereas that was much more difficult in Edison's time due to businesses back then having much higher capital requirements and Edison caring more about his lab being funded than his wallet getting fat. In this way, the Google founders are more like Bill Gates, smart in both technical AS WELL AS financial.
The only trouble I see Google getting into, is their whining about monopolistic behavior on the part of MSFT and the wireless telecom companies. Just shut up and compete. Everyone knows that Sherman Anti-trust is the worst law ever passed in the world wide. So just ignore it, and win the old fashioned way-- by being better.
Google will make $40 per share inside the next 5 years, and have a whopper of a balance sheet net cash position on top of it. Will trade above $1,000 per share, defying the recessionary fear which is keeping it down $200 below it's highs from last year. You just have to be patient, incredibly patient, but this is the great price to buy it.