I'm creating an online power monitoring system so you can see how your home or office uses power. A web platform is great for this because we can centralise the processing / graph generation and analysis and then put simple, cheap devices into people's buildings to do the actual measurement.

See: http://www.gridspy.co.nz/

We offer live data (updated every second while you watch) and multiple channels, all at a price that is cheap for a solution like ours.