NewsForge (Also owned by VA) is running a short writeup on how to put MediaWiki to work
for your organization. The writeup includes several addition tools that could be helpful in rounding out the overall package. From the article: " Imagine how useful it would be to have an online knowledge base that can easily be updated created by key people within your organization. That's the promise of a wiki -- a Web application that 'allows users to easily add, remove, or otherwise edit all content, very quickly and easily,' as Wikipedia, perhaps the best-known wiki, puts it. Why not bring the benefits of a wiki to your organization?"