This is great. Recently I noticed that Seattle doubles the cost of your electricity when you exceed a certain threshold. (http://www.seattle.gov/light/accounts/rates/docs/2012/Jan/20...)

With the API I'm going to write a little script to monitor usage and send me a prowl alert when we're close to the limit. Fun stuff!

Edit: I was considering adding PV panels to my roof. If my meter runs in reverse during the day, will WattVision still work?