Jeff Howe's assessment of Assignment Zero - a crowdsourcing project. The lessons learned make interesting reading - with occasional "well, du-uh" moments.
Like the need for a clear call to action for participants. If you want a large number of people to come together to achieve something, you've got to give them clear guidance.
Communities are communities first and project teams second. And any community requires some kind of leader-figure. Whether that's one that develops organically within the group (as it would socially), or is asigned by the project owner. Somebody has to be the central point of contact, the person with the plan. Or at least a plan to have a plan.
And don't forget the many different personal drivers for people who get involved. I'm still puzzled that this seems to come as a surprise to so many. It seems so obvious;
...people participate for a complex web of reasons, including the enhancement of one’s status within the community, the opportunity to learn or perfect a skill, the chance for financial gain or simply the intangible rewards from working with others toward a shared goal.
As well as an enormous passion for their subject of course;
What the interviews make clear is that contributors volunteered to tackle subjects about which they were passionate and knowledgeable. In this they held a considerable advantage over professionals, who often must complete interviews with little time (or inclination) for advance research.
I like this idea of "amateur expert". It's not a new one, but I wonder if it could be harnessed by content providers in a more structured way. Hmm.