Everyone and their brother and sister seems to be trying to capture the hearts and minds of the power companies to manage in-home electrical usage. Do the power companies have either?
One - Take a Crestron Prodigy System with a wireless thermostat. Any Crestron control system can be used - what's interesting about this one is you can put it in for a lot less than any climate logging system I know about.
+ 
Two - Ambleside's Sensor Logging service moves data from Crestron to Google. We can move lots of interesting information - temperature + humidity, power usage, exercise machine usage with heart rate-anything really. In this case we're recording the temperature of our office.
[I used to have some live data but the hits just went through the roof...static data for now]
;)