John Robb has written some documentation for knowledge webloggers using Radio who are just getting started. This is definitely a piece that needed to be written. Another that they need to write (and it looks like John is working on it) is a deployment white paper on how to set up klog network using the Userland tools.
David, here’s another blogger on knowledge sharing you might find interesting:
Seth’s focus is more on the academic side, but there’s some good stuff in his blog.