Small prefab home; nice design [View all]

though unfortunately, only available in Europe (for now, at least):

http://www.treehugger.com/modular-design/czech-out-new-small-prefab-design-architect-marek-stepan.html
From the article:

One of the reasons I prefer modular construction to the trendier shipping container housing is that the size of the module can be designed for people, rather than stuff. The Freedomky, from Czech architect Marek Štěpán, is a good example. It packs a comfortable 400 square foot one bedroom unit into a single box.

t is a very energy-efficient design that comes with a heat recovery ventilator and an air-to-air heat pump. All building materials are "ecologically benign." Photovoltaics and solar thermal hot water are also available.