PizzaFace writes "Personal communication devices always allowed people to communicate easily and to coordinate their plans at the spur of the moment. As PCDs became widespread, they allowed their owners to converge rapidly in large groups, for purposes social or political. Now something else is happening. Ubiquitous PCDs give each owner multiple simultaneous opportunities for communication or convergence. People surf their PCD network from one conversation to another, and physically surf the most promising of the gatherings to which the network invites them. Their web of social contacts is as broad as the globe and as shallow as a cell phone's keystroke. What happens when people become nodes on a network? Joel Garreau reports provocatively in the Washington Post. His sample is skewed by Washington's summer influx of interns, who come from around the country to work for little or no pay in part because they're chasing 'peak experiences,' and who have lots of disposable time and energy, no local roots or tethers, and an unusually large network of like-wired acquaintances." I think the conventional (and most descriptive) term for this behavior is flash crowd.