I had some vague notion that Earth Hour was on my heels once again. I posted last year about Earth Hour (here, and here) but chickened out. I'm going to do it this year, though! I'll post photos (or does that go against the theme?).
Also posted in 2007 about the more general idea of prescribed or voluntary blackouts and what shape and forms that would take. In the post I link to a couple of places in the U.S. where they have already tried this on a large scale.
Small gestures like Earth Hour build into consciousness-raising for the society that consumes the most while being miniscule compared to the rest of the world; I hope this continues to gain momentum in the coming years as we become more aware of our environmental fragility in the face of global warming and its impact. I haven't taken it very seriously until now because I believe that we need to do more than the symbolic, and Earth Hour should be every day. I'll participate this year, though, and look forward to seeing the results.