Great video on the cloud data center from Microsoft
http://microsoftfeed.com/2011/microsofts-datacenter-tour-video/
Older video on Microsoft video outlining key concepts for its Generation 4 Modular Data Center , which it unveiled in Dec 2008
http://www.youtube.com/watch?v=PPnoKb9fTkA
Greatest 10 DataCenters
http://blog.open-e.com/the-biggest-or-the-geekiest-data-centers-of-our-dreams/
