Web-logs or blogs are annotated lists of pointers, updated by enthusiasts daily or weekly, for the sheer joy of turning others on to interesting stuff on the Web. Bloggers build reputation by pointing out useful or interesting items. This is gift-economy Knowledge Management in action. I learn as much from CamWorld and Tomalak's Realm as I do from the Wall Street Journal. If I ran the zoo, every business unit manager would maintain a blog for peers and comrades.
Popularity is on the rise.
For collaboration, turn to eGroups or Delphi for sharing documents, broadcasting messages, hosting discussions, and chat. Gnutella or its brethren should do the trick. Regular ol' knowledge management suffers from a number of problems. It is often top-down, and of course the top can't define a workable structure for those on down. The beauty of a Gnutella database is that it is organic.