The OAN is a free, Web-based network that's part database of architectural projects, part design tool, and part community, and its ambitious goal is to improve the living standards of 5 billion people—a number that includes not just the 1 billion people living in abject poverty today, but the one in three people who, by 2020, will be living in slums.
With 5,700 members and 1.3 million visitors in June, the OAN taps into the collective intelligence of the web to improve the living conditions of the urban poor.