I am at http://flosscommunitymetrics.org/ and just noting my thoughts relating to discourse.
Thought 1: monitoring regular contributors activity over time in order to care for your community members.
We have about 10 hard-core contributors on out forum (not many, can be tracked by a human over time). Recently, one of our key people “fell of the map” and stopped talking, after about 10 days I realised there was something wrong. Turns out he was seriously ill, we sent him a bunch of flowers etc, now he is better. Would be good to monitor individuals over time for big changes in their posting behaviour, so in a larger project the community manager/leader can reach out and find out what the issue is.