I found this nice video about really nice system for monitoring home energy efficiency:http://www.youtube.com/watch?v=E4h93XregQc
And it is not too expensive when compared to other solutions out there. It costs 500$ with 12 current clamps that monitor 12 power circuits, for some 44 circuits it costs around 900$.
From video it looks like it works only with their web service that costs 7$/month but they say that the device has also internal web server (but not too nice one). Still if somebody wanted he/she could scrape info from that web ui.
Really impressed with this company, hope they do well.
If anybody knows of some similar products feel free to post a reply or send me a direct message.