It’s an ever-interesting field. Most CoP literature still refers to CoPs as “self-organising” as if that meant lack of organisation, but -slowly- the idea that CoPs are institutions with processes and culture is taking hold.
One of the documents that has always held most interest for me in this field was written by a Macuarium administrator some years ago. She was commenting on the parting shots (and attitudes) of some people who leave a community, and it underlines very interesting aspects of the real-world dynamics of a CoP. Including the values clash, the power struggle, and the methods and sources of authority.
It’s worth the read. But only if you can read Spanish ;-).