EDV-01 is small, just 6m x 2.5m x 2.4m; but they weigh in at 10 tons, so they won't tip over in the light breezes following a hurricane. Each one has a bathroom, kitchen, beds, and satellite connectivity.
You have a preference for off-the-grid living? No problem. There are also fuel cells and batteries along with solar panels on the roof; water is condensed from water vapor in the air.
Take a look at the delivery system that goes with the EDV-01; start viewing at about 3:30 if you just want to look at the EDV-01 unit itself.
Apparently, there is more to the EDV-01 than just a nice concept; Daiwa Lease is apparently trying to manufacture them.
I like the idea of having a self-sufficient house that you can just drop wherever you want one. I read about it in Childhood's End, a 1953 novel by Arthur C. Clarke.
Most people had two homes, in widely separated parts of the world... There was nowhere on the planet where science and technology could not provide one with a comfortable home...
Update 5-May-2012: I found an earlier (and closer) prediction of this idea in Clifford Simak's 1952 novel Ring Around the Sun:
"The houses are prefabricated units," said Crawford, "and they sell at the flat rate of five hundred dollars a room — set up. You can trade in your old home on them at a fantastic trade-in value and the credit terms are liberal — much more liberal, I might add, than any sane financing institution would ever countenance. They are heated and air conditioned by a solar plant that tops anything — you hear me, _anything_ — that we have today. There are many other features, but that gives you a rough idea."
(Read more about Simak's solar-powered pre-fab house)