Microsoft is holding an TechNet webcast called Transforming the Data Center with Energy Efficiency —– “With the explosion of online services and cloud computing, the rapid scale out of IT and IT infrastructures needs to grow at a pace that meets the needs of the businesses while maintaining both cost and resource efficiencies[…].”

You can sign up on TechNet Webcast page and you may also be interested in Cloud Computing Futures: Creating Greener Clouds with Microsoft Research.