Mutual Credit (aka Community Currency, Complementary Currency, Local Currency)
http://www.complementarycurrency.org/
http://www.openmoney.org/top/omanifesto.html
http://youtube.com/producismtv
Social Entrepreneurship
http://en.wikipedia.org/wiki/Social_entrepreneurship
http://www.pbs.org/opb/thenewheroes/whatis/
Social Networking
http://www.youtube.com/watch?v=3SuNx0UrnEo
Gamification
http://blog.producia.org/tagged/gamification
Worker Cooperatives
http://cultivate.coop/wiki/Main_Page