[mccollin]

Thats a good overview, and it also links to a list of CMS systems... which gets further complicated by the fact that the list includes things like POSTNuke and wikis that aren't really comparible to the classic CMS. I think that a lot of people throw around the term "CMS" when they really don't mean CMS. The vast majority of forum owners are looking for a way to add a useful home page and some static non-forum pages. They want to be able to show news on the home page, being fed by a forum. This isn't really even the correct definition of a portal, but it probably fits that better than CMS. If you don't intend to add other types of content outside of forum threads, then you don't need a CMS. With vBulletin adding blogs, they start to blur the lines.