Have you ever watched a large flock of birds rising and turning almost as one? As the flock takes flight there is a moment of disorder and chaos among the birds. Suddenly the flock takes form and finds it's heading.
The key is communication between the members. This communication occurs so quickly that researchers aren't sure from where it originates or how it's even perceived by the members. They do, however, agree that this communication takes place, and they also agree this communication is what allows for the efficiency of the flock as a whole.
Wikiplanning provides an almost effortless way for neighbors to communicate their views to each other, as well as their leaders, for the good of the entire community... Hence the metaphor.
Come on...Communicate and fly!