You've now got about two weeks to comment on the first draft of the Environmental Protection Agency's proposal regarding how to apply the Energy Star program to servers.
(Here's the page with both the draft of the specification along with a letter explaining the contents. They are PDFs that you can download and read.)
The draft outlines ideas that pertain to power supply efficiencies, maximum idle power requirements, standard information reporting (the EPA likes the specpower_ssj2008 test), and power and temperature measurements. Manufacturers that want to earn an Energy Star certification will have a year to comply with the various tiers that the specification defines. One note: DC-power servers won't be covered by the specification.
This story from the Environmental Leader provides some further context around this latest Energy Star development along with some additional reference links.
We'll be keeping an eye out for progress on the Energy Star server front.