Google is calling on the computer industry to create a simpler and more efficient power supply standard that it says will save billions of kilowatt-hours of energy annually.

http://www.nytimes.com/2006/09/26/technology/26google.html?ex=1316923200&en=dd1a0e8681a54b4b&ei=5090&partner=rssuserland&emc=rss

See also:
http://googleblog.blogspot.com/2006/09/towards-more-efficient-computing.html