I finally had a chance to read this Wired magazine article on Google's data center. It is a very interesting article and definitely worth a read.
Google only shares a few secrets about what they have learned running such a large operation. The cost of power is one of the main drivers for innovating in this area. It does not hurt that this is also very green and good for the planet. It would be very cool if Google can make some big breakthroughs info battery technology and power generation technology. My guess is Google will be much more effective at creating a carbon neutral data center than the government would be.