While I was referring to posts by Ross Mayfield on audience sizes and blogs, he himself brings them together in Social Capital of Blogspace.
Also interesting: John Udell on Scopes of Audiences. (via both Ross Mayfield and Lilia Efimova)
I would like to argue that overlap in scope is not only a matter of addressing other numbers of public (3, 300, 3k, 3M etc) but I believe that overlap in scope is also hugely interesting in terms of multidisciplinarity. It is very often that I pick up ideas from other disciplines that offer a view, or approach that enriches what I do in my own field. Now of course KM is multidisciplinarity turned flesh as it were. So is KM the art of finding scoping tools, and learning to be ‘human routers’ (Lilia) / ‘community straddlers’ (Ross)?
(edited comment I posted in response to Lilia Efimova)