The Grid, Our Cars and the Net: One Idea to Link Them All | Autopia
http://www.wired.com/autopia/2009/05/the-grid-our-cars-and-the-internet-one-idea-to-link-them-all/

To summarize: build the smart grid on top of the Internet, and put wireless mesh routers in power meters and cars.

So obvious once heard; everything can be reduced to software eventually.

The intelligent network we need for electricity can also turn cars into nodes. Interoperability is a multiplier.