Mapping group activity or, 'community'

I've quickly tried to map some of the dynamics of different 'community' mechanisms, partly inspired by Tom's Model for Mapping Group Activity.  It's basically aimed at clients and intended as a basis for developing 'community strategies' and is a very rough first draft.

What I haven't done is map offline activity or looked to illustrate the specific dynamics of each system via examples.   It'll be interesting to see where the offlineactivity 'sits' with the online activity and what we can learn from looking at them together.

Thoughts?  Comments? Please annotate the flickr image as you see fit...