How will sites such as WikiTRIBUNE do investigative stories?

I like what WikiTRIBUNE is trying to do. I can see how their model of reporting can provide clear information on recent events.

I don't understand how their current model of reporting can work with investigative articles.

I assume one reporter would do the initial work. Once released changes would be made and the article would take a life of its own.

Investigative work can be unbounded though. When do you say "enough content for this article, start a new one somewhere else". Where do you choose these boundaries? Do they need to exist? Who decides on those boundaries?