Alexander Johannsen provides some interesting (and long) discussion about how he is using a wiki in his work environment in Wiki as a KM and PM tool.
Not only is he using the wiki as a repository, but he's also integrating other tools to share information between the wiki and those other tools. This is one of the central ideas of knowledge and content management: the ability to reuse the same stuff in many different ways. The discussion is fairly technical, but it is useful to see this documented and where people can take things.