Aug 29 2009: skeleton of some ideas.
From Wikipedia:
PKM Software
Weblogs (with RSS) and wikis are emerging as important elements of some organizational 'bottom-up' PKM systems. Other useful tools include Open Space Technology, cultural anthropology, social bookmarking, stories and narrative, mindmaps, concept maps and eco-language, single frames and similar visualization techniques, just-in-time canvassing tools, automated knowledge harvesting tools, and Google Desktop and similar desktop content management tools. All these tools are self-organizing and self-managing tools, introduced ad hoc by self-forming groups within an organization to facilitate knowledge sharing and personal content management.
Also see Semantic Desktop.