PC Magazine Rates Green Computers
PC Magazine just introduced a "Green Approved Seal" for computers. While the major power saving for computers is going to be in data centers and server closets (the so-called Green Grid), there are things you should consider when purchasing your laptops and desktops, and PC Mag has done a good job putting together a lot of consumer info around this. Most of their articles are focused on the home user and small/medium business space. Certainly worth perusing.
Their special coverage is here, or skip directly to the machines they give their "Green Approved Seal" to.