The term first coined at a conference brainstorming session between O'Reilly Media and MediaLive International, which also spawned the Web 2.0 Conference.
P. Pirolli, E. Wollny, and B. Suh. CHI '09: Proceedings of the 27th international conference on Human factors in computing systems, page 1505--1508. New York, NY, USA, ACM, (2009)
O. Nov, M. Naaman, and C. Ye. CHI '08: Proceeding of the twenty-sixth annual SIGCHI conference on Human factors in computing systems, page 1097--1100. New York, NY, USA, ACM, (2008)