Who else is going to do it?
For those of you who don't know:
http://news.yahoo.com/s/ap/20080329/...rld_lights_out http://www.google.com/ (click on it, it looks cool)
http://www.google.com/intl/en/earthhour/
The idea of it, is to turn off your electricity for one hour tonight (from 8-9 PM for your timezone), to raise awareness of climate change and energy conservation.