I would rather throw my lot in with a market-signalling coalition of the good-willing than all the vapid international treaties and lobby-bruised politicians in the world. And Google PowerMeter now offers me a practical way to participate (assuming Google in Oz offers same). Here's their spiel:
See your electricity use from any Google Powermeter enabled device.
Understand more about how you use electricity throughout the day.
Reduce your electricity use and lower your monthly bills.
Since Google are currently exhausted from Doing No Evil, they are Doing This Gratis, participating leprechauns, and their offspring, get to keep their saved gold: