Another great article. Nice and short too! The recommendations at the end are very good. I particularly liked the "make participation a side-effect" suggestion - that's a really interesting dynamic they've hit on. That last one is interesting too - "promote quality contributors". He suggests doing it based on "reputation ranking" (from reputation manager sites, presumably). The problem with that is there are few, if any, real *generalized* *people-centric* reputation management systems. Is this a niche waiting to be filled? Or is someone going to point out that there are tons of these systems already?