Harold -- Love this quote "Enterprises adopting social business need to find and support people who can model knowledge-sharing behaviours, not just talk about them."

That's the thrust behind Emergineering:
http://traction.tractionsoftware.com/traction/permalink/Blog1326

And Carving a Path to Productive KM
http://traction.tractionsoftware.com/traction/permalink/Blog2012

Slides 16 and 17 speak to how the contents of an activity feed can also be structured in a dashboard for enduring leverage.