Pattern Language and Moderation Strategies
I got very excited last year when I discovered Clay Shirky writings about moderation strategies (unfortuantely I can't locate the original article). His wiki for Pattern Language is an equally valuable resource for developers who are working on social software and need to consider moderation and group / self management strategies to ensure the project doesn't go pear shaped.
Even if you're not working on a large social software application, it's worth have a read of this material. It provides some genuine insights into online group behaviour and how to consider managing it.