This is the third year in for Earth Hour 2011 and I just started reading about it, like 20 minutes ago. It is a beautiful movement to participate in and I'm joining in on it.
Anyone else on board? The biggest supporter is "World Wildlife Fund", if you go on their site it will show you different pictures of countries taking action on lights out. The eifel tower was one that turned out all the lights and it was beautiful to see. There are many others to see as well.