I'm confused, did you mean the West Coast of Australia where the Earth Hour movement was initiated, or do you think USA/North America is the only continent involved?
Although I agree, it is a frivolous exercise on the whole, I do appreciate the gesture behind it. Every year it makes me think about the electricity we use, and do a little bit more each year to try and reduce our power bill. To be honest, before the whole Earth Hour thing started, I could not have cared any less about my power bill. Since I've started the whole Earth Hour thing, once a year I am reminded to go through the house and replace any bulbs that are missing or incandescent (we do near strictly CCFL bulbs everywhere), and also it reminds me to take a second look at all our entertainment centers. We've got 5 TVs in the house, and each year I'll go through everything, remove any unnecessary components, or decide I don't use the desktop enough to merit leaving it running. A couple years ago I condensed my media server and HTPC into a single machine, and this year I'm going to consolidate my desktop hard drives into my HTPC as well, resulting in only having one computer running, where I used to have 3.
In the end, I think that although the idea itself isn't the most effective, it does at least remind a few people to reduce their energy usage, and I think that's a good start for anything.
What have you guys done to help reduce your utilities? Or has everyone just bought more stuff to run up their bills?