Something that hasn't changed since Mies' day: So much glass creates an unusually high heating and cooling load.

WSJ: The Greening of a Midcentury Classic

To really squeeze your power consumption you need to be able to manage your data center like a video game, watching application usage, powering servers up and down, shifting load from one data center to another, reconfiguring racks and servers with power and cooling impact in mind.

FORBES: Power Management Questions for Every CIO