Wiki Community is more like our human world - open to change, which is the spice of life. The changes may be good or evil, depending on one's viewpoint, but only the most suitable will prevail. This is what nature is all about. -- Raj
A bunch of human beings communicating via a shared notepad. Nothing to do with a WikiMind, whatever that might be.
ClayShirky has a very interesting article on the difference between communities and audiences. The quickie summary is: audiences scale, communities don't.
From ClayShirky's Web pages: "communities have strong upper limits on size, while audiences can grow arbitrarily large."
The WikiCommunity, however is not composed of each and every member interacting on each and every point. Since interaction is possible by every member on every page, but is practiced by only about 1/70th of the members on a limited number of the pages, the potential of the community is greater than one might think.
The WikiCommunity is composed of audiences as well as participants. Taking that into consideration, it can be said that while communities don't scale, audiences and wikis do.