I wrote an article for O’Reilly Media’s DigitalMedia Mac Center titled…
How Much Electricity Does a Mac Use?
I measured a bunch of electronic devices including a MacBook and iMac using the inexpensive P3 P4400 Kill-A-Watt measureing device. The results were, IMHO, quite interesting.

Interesting real-life report from ExtremeTech’s Loyd Case…
Going Solar: The Install
…where he describes the experience of converting his home to run mostly on solar power.

PC Magazine’s title was good enough to get me to read this article
8 Geeky Ways to Save Gas
The only thing that struck me as odd about this tech geek oriented article was that it did not suggest switching to a gas-friendlier geek-appealing hybrid or bio-diesel car.