On Wednesday, The New York Times filed a pair of articles on small homes. The first, specifically covered prefab sheds:

Tiny, high-style prefabricated sheds like the Kithaus have received a great deal of attention over the last year, with admiring coverage in design blogs and magazines, and roughly four times more companies producing them now than five years ago. So far, the market is still small, though a tipping point of sorts may have been reached this year, when Design Within Reach began selling the Kithaus, along with furnishing packages to turn it into an instant office, bedroom, pool house or den.

Companies and models included in that article:

• kitHAUS K4
• Modern Shed
• Modern Cabana

The second explained the "tiny house" phenomenon:

... spaces that are smaller than 1,000 square feet and, in some cases, smaller than 100. Tiny houses have been a fringe curiosity for a decade or more, but devotees believe the concept’s time has finally arrived.

Prefab models mentioned:

• Tumbleweed Tiny House Company