We will do Earth Hour tonight I think, yes. But Keith Ng makes some very good points about it on his blog at Public Address.
I'm getting excited about the challenge of going fridgeless, and heard from a friend last night that she is thinking of doing it too.
Also, I have really appreciated some comments from Kate about it, containing great ideas and advice. I'm especially interested in the Nigerian invention of zeer pots, and the cooling possibilities of evaporation.
But the first step is to start using up everything in our fridge's freezer box, in preparation for switching off. (I recently started stocking up on frozen stuff, so this is a bit of a reversal and it'll take some time to get through everything that's stashed in there ...)