Based on my experience and observations I would add another section to this article on Learning Management Systems. I see many organizations combining formal "learning" with the less formal types of KM described in this article. For example we have built a corporate intranet that includes both SCORM-based training programs for new employees and many of the "Answer Questions" and "provide information for decisions" types of KM. I've observed that many nonprofits, professional organizations and continuing education organizations combine formal education for certification requirements with less formal knowledge management, especially of the "encourage people to take advantage of other people’s knowledge" and the "ensure everyone can find the documents and other resources useful to them" kinds.

Currently we are extending the Learning Object Repository System (LORS) to allow administrators and teachers to put together online courses that include Wiki pages, uploaded IMS/SCORM content, files and forum discussions. One of the use cases includes a medical community where experts work together to create and maintain a wiki; pages of that wiki are used in training programs for new residents in combination with more traditional online assessments.

Overall this is a nice plain English article that will help you refine your thinking about KM.