Check out this excellent Guardian article by Louise Kidney about how tapping into online communities can help councils engage with their citizens.
She asks: “How do you identify a community that you can’t see – one which exists in a space which allegedly has no borders? And how do you quantify the value of a digital community, surely it’s just a load of people sitting around chatting?”
An excellent read if you are interested in the difficulties of trying to define a community and its use value.