In the last few years, traditional collaboration—in a meeting room, a conference call, even a convention center—has been superceded by collaborations on an astronomical scale.
D. Simmen, M. Altinel, V. Markl, S. Padmanabhan, and A. Singh. SIGMOD '08: Proceedings of the 2008 ACM SIGMOD international conference on Management of data, page 1171--1182. New York, NY, USA, ACM, (2008)