http://www.personal-kyoto.org/energy_usage/share/61
You enter your ConEd account number and they go grab your power usage history and map it to your own Kyoto Goal, plus compare you with people in your zip code. In my case Manhattan vs Queens, Brooklyn, and the national average.
It is pretty clear that big spike is the air conditioner and that in the winter time I’m doing pretty well. I bet I could knock a 100 kWh off if I had a more efficient PC and fewer harddrives. At what point does it make sense to dump my P4 3.4 Ghz power-hog, spend $600 on a Core 2 Duo, a new motherboard (& RAM?) and a 750 GB perpendicular drive?
Try yours, see what you get: Personal-Kyoto.org