Prefab 20*20: Visions for 400 SF Homes, an international open ideas competition organized by Architecture For Humanity Vancouver, Architectural Institute of British Columbia, Interior Design Show West 2009, and sponsored by Azure Magazine, recently announced the winners and shortlisted entries. Prefab 20*20 challenges designers to propose a free-standing, prefab dwelling unit for a footprint no more than 400sf (37.5sm) in an urban setting anywhere in the world. Fit for two adults, its basic program shall include sleeping, bathing, cooking, living, working/studying, and storage areas.