1sockchuck writes: Data center developers are buying up land in northern Virginia, preparing for explosive growth of cloud computing infrastructure. Digital Realty just bought land in Ashburn, Virginia to support 2 million square feet of data center space, while DuPont Fabros, RagingWire and Sabey have also locked up land parcels for future growth. Why is Ashburn so hot? Cloud builders crave proximity to an Internet exchange operated by Equinix, which itself just bought land for another 1 million square feet of colocation space. That's one of the reasons why Amazon Web Services operates more than 20 data centers in northern Virginia. "Data center demand is stronger today than it's ever been," said Bill Stein, the CEO of Digital Realty.