PlotWatt is a web service that uses a utility provided smart meter or your personal energy monitor to analyze your energy data and give personal recommendations.
From the PlotWatt website:
"All you need is a smart meter that can send your house’s real-time power data over that series of tubes we call the internet. There are a couple of inexpensive add-ons that will get you connected in no time. PlotWatt works with TEDs, WattVisions, and many more coming soon."
PlotWatt also works with the PowerCost monitor.