I've found a new favorite place for juicy green info... David Chu's Facebook Notes Page (aka Secretary of Energy or our proverbial "Energy Tsar"). He posted this little chart the other day that breaks down energy use by commercial vs. residential use. The big difference? Commercial energy use is largely driven by lighting versus heating (the more likely candidate at home). Many people ask me where to focus their attention when it comes to energy use. This little chart is a nice cheat sheet. That said, I believe that computer/office equipment creates a bit more energy proportionately (if you've got lots of servers, that number goes up more).