We're going to start a series of showcase articles on outstanding wikis, while making the case for MediaWiki and QualityBox. Meanwhile, we'll start off with this anti-case: https://neosmart.net/wiki/ People have come to associate 'wiki' with 'Knowledge Base'. Unfortunately, this 'wiki' is running on WordPress - which just isn't suited for the task at hand. While I applaud NeoSmart for offering up a vast collection of knowledge, you can instantly see how being constrained to structuring 'documents' by some hierarchy or tagging scheme alone is just not enough.
Uses
What can you use MediaWiki for? wp:Possible uses of MediaWiki