These Google tech talks are a great resource.

ABSTRACT On Wednesday, March 29th, by invitation from our co-founders and CEO, our special guest, Vinod Khosla, visited Google to deliver a tech talk about the emergence of ethanol as a viable, market ready, and competitive source of renewable energy.

A very indepth panel discussion at the University of Chicago on the state of oil-exporting nations.

A presentation with Adrian Hong, who was recently arrested by Chinese authorities for helping North Korean refugees, at Google on June 29th, 2007.