If you can get your hands on a copy of MIT Sloan Management Review, the Winter 2009 issue, there is an interesting article on The Power of Collective Intelligence. It describes different tools to gather collective intelligence (like this discussion board) along with the various metrics collected. For example, success with Wikis are measured by metrics such as quality, accuracy and frequency of contributions, use of output in real situations. Interesting Level 3 measures. Is anyone out there measuring the success of online communities and informal learning processes using measures such as these?