Excellent example of what you can do with a Wiki -- in this case, for an "unconference" appropriately enough being organized by Stephen Francoeur in NYC for Tues. Aug. 14.

People are signing themselves up (over 125 at this point) as well as suggesting discussion topics, and of course, anyone can edit any of the pages. This is a good demonstration of the strengths of this technology -- particularly as a vehicle to channel people's interests and enthusiasm in a collaborative online environment.