According to coverage at HPCwire today AMD has released a study revealing shifting patterns in worldwide datacenter energy.
This new study forecasts that, based on current growth trends, the U.S. share of total world server electricity use from datacenters will likely decline from 40 percent in 2000 to about one-third by 2010, while the Asia/Pacific region (excluding Japan) will increase its share from 10 percent to about 16 percent over that period. The absolute electricity consumption for servers in the Asia/Pacific region under this scenario would more than double from 2005 to 2010, requiring electricity capacity equal to output from two new 1000 MW power plants. For the entire world, server consumption from 2005 to 2010 would require additional capacity equal to more than 10 additional 1000 MW power plants.
You can read the study for yourself at http://www.amd.com/koomey.