T.E.D. 5000 is pretty sweethttp://www.theenergydetective.com/ted-5000-overview.html
The new ted 5000 system looks like it may work out of the box for us maybe. Linux compatible and has ethernet connectivity.
"Energy, Inc. has made the TED Footprints API available to 3rd party developers to create applications that present TED's energy data in different formats. Energy, Inc. does not provide support for these 3rd party applications, but simply makes them available as a convenience. Enjoy! "
The old version 1000/1001 is already integrated with My:ro control http://www.meetmyro.com/overview.asp
and looks pretty nice with the way that home automation program presents it. A electric/power section would be a neat addition to linuxmce