Here is a video from TED where Derek Sivers is talking about the importance of the first follower. To start a movement you must have a leader, the person with the idea and the willingness to go out on a limb to get things started. However, until someone else steps up and joins in, you just have a lone person. Once you gain a follower the movement starts and more and more people join you. The fence sitters get involved.
This was a great (and quick) demonstration of the power of that first follower and how leaders must embrace them.