Ross Mayfield has an excellent essay on the spectrum of participation, the choices we have about how much of ourselves to put into any given activity on the Web. He points out that high engagement activities like leading, moderating and collaborating build a sort of collaborative intelligence that's greater than the collective intelligence we get from low-threshold activities like tagging or commenting. Writing--blogging--is somewhere in the middle because you can use a blog merely to comment or you can use it to refactor, moderate, and lead. Your choice...