I ran across this article form CMSWire that focuses on blogs and wikis as enterprise applications. Blogs and wikis are seen as unique types of content management solutions, but I think that if you looked at the feature set of any mature content management solution like Content Management Server you'd find that the functionality offered by blogging engines or wiki tools can be fairly easily implemented as extensions to an existing CMS. Are there any good examples of this with MS CMS and wiki-like extensions?