A friend of mine tipped me off to these small houses, because he's seriously thinking about living in one full time:

http://www.tumbleweedhouses.com/
<img src="/images/graemlins/laugh.gif" alt="" /> <img src="/images/graemlins/laugh.gif" alt="" /> <img src="/images/graemlins/laugh.gif" alt="" />
These homes are apparently incredibly effecient when it comes to size and energy use. They are designed to get the most living space while making the smallest dent in the environment. You can keep them on a small piece of land or hitch them up to a truck and take them anywhere.

Pretty neat! <img src="/images/graemlins/laugh.gif" alt="" />