Have a look at DigitalStrom http://www.digitalstrom.de/index.php?id=115&L=2 (in English)
At ETH Zürich (Swiss Federal Institute of Technology) they developed a microcontroller that can be directly attached to 220/110V power lines.
At first they will put the chip into insulating screw joints but they are also talking to makers of household appliances to incorporate them directly.
They will publish the management software as GPL
I believe that they have a very good chance to take off in the market.
The real first netbook was the Atari Portfolio from 1989....
8088 based and running DOS.
I have recently browsed through the latest SIP RFC looking for ways to be more NAT friendly for VoIP.
What I found is not very conclusive: The latest RFC indeed tries to push TCP as default transport for SIP (Yessss signalling links are making a come back) but the use of TCP connection is left to a lot of ambiguities.
If you can't learn to do it well, learn to enjoy doing it badly.