I just watched this video presentation on YouTube by Google's CIO and VP of Engineering, Douglas Merrill. 

It has some really interesting content and gives a great insight into Google and how it is trying to nurture a culture of innovation.  I read an interesting comment for this video on YouTube that likened Google to a "for-Profit University" rather than a regular corporate behemoth - which I thought was an interesting view.

Anyway, if you have the 50+ minutes to invest and don't mind Google Adwords being compared to the evolutionary impact of an opposable thumb, then this is well worth it.