If you don't know already, Earth Hour this year is tonight, March 29 from 20:00 - 21:00 local time. I'm, of course, going to participate and turn off all our lights. What's most interesting to me are two things:
1. The metrics of how many participated ( much CO2 and energy was saved) and how they'll compare it across time zones.
2. how many babies will be born 10 months from tonight because of this.
If you haven't heard, or want to know what's up, check it out here: http://www9.earthhourus.org/
On another interesting note, is something I read from Google's EarthHour homepage today.
I had believed (or wanted to believe) blog post months about how if you just chance the color of the screen background from white to black (they used Google w/ black background -- Blackle-- as the example) that the monitor would use slightly less energy and therefore be less energy taxing/environmentally friendlier. Well, on Google's Earth Hour page explains it doesn't matter what color the screen background is. That's good for visual design since I have Accessibility questions about the contrast being high enough.
Grab a drink, turn off the lights. There's plenty of ways to entertain yourself for an hour in the "dark."