More to explore:
Modern Prefab Kit Houses
SIPs house kit
Passive Solar Prefab House Kits Updates, With Rain.
Felipe Ortiz, Pablo Ropert — Sip House
Prefab Cabins | Small Prefab: Mini House One + | Busyboo
The IT CABIN kit house by IT HOUSE
Prefab house kit (+plans): Modern prefab homes. Modular homes. Manufactured homes
Wow this certainly gives a new meaning to "trailer house".
Passion House: Prefab Modular Housing in interior design architecture Category
Amazing (and often green) alternative pre-fab houses
Soe Ker Tie Hias (Butterfly House)http://www.oddee.com/item_96930.aspx