Flash mobs (AKA smart mobs) seem to be spreading like wildfire.

Personally I hope they stay harmless (they’ve already been used for mild
forms of terrorism), because the idea does appeal to my primal tastes.

I signed up for the Chicago mailing list - should be fun to be a sheep for 10 mins.

Check out this or this i f you’ve never heard of a flash mob. They seem to be decent starting points.