b.cognosco

This is more a process problem than a technology problem. One good answer is what John exhibits here -- continue to mine those older posts and bring them to the fore for new readers. Also, you'll note that the text of the posts are actually in the Yahoo! Groups: K-Log discussion group. A second method John uses is to put key info into several formats and link between them, leaving a trail of virtual bread crumbs to lead users from one vehicle to another.

• Mapping the Corporate Knowledge Network
  Organizational Network Analysis[ONA] is a software supported methodology that reveals the real workings of an organization. I call this the corporate knowledge network. K-Logs (Knowledge Management Weblogs like Radio) let you map a corporation's knowledge network. How? Through the following:[...]
• Consultants and K-Logs
  One thing I have been tracking is the interest of consultants in K Logging. I was a consultant/analyst when I was at Forrester (they charged me out by the hour at $1,250). If I had known about K-Logs, it would have been very easy for me to offer clients a company-specific knowledge stream (for $10 k a month as a retainer). There would have been at least 4-10 clients that would have opted for this, and it would have made my job a lot easier (it also would have added 10-20% to the revenue of my research practice while keeping me in touch with client's needs).[...]
• K-Logs vs. Discussion Groups
  Here is my thinking on the differences between K- Logs and discussion groups. I have been talking to lots of people recently about the state of their discussion groups. To a person they have told me that they weren't what they expected, and some have said they have been a disaster. I am fairly sure that anyone that been exposed to an advanced K-Log system (with categories, RSS subscriptions, and community functionality) would never opt for discussion groups alone.[...]