Seasonic PowerAngel Power Monitor
snip: "Did you ever wonder how much power that computer sitting next to your desk is really using? Or for that matter, how about any other electrical device in your house? What's running efficiently, and what's making the little meter spin? The device we're looking at today, from Sea Sonic Electronics Co., is the Seasonic PowerAngel power monitor. Designed to identify power-wasting appliances, help forecast electrical expenses, and assist in troubleshooting problems, the PowerAngel also makes a great companion for the computer enthusiast."