I plan to implement content versioning very soon in the html content featue so we can revert to any previous version of the content like a wiki.
I also have plans to implement tagging in a way that makes it re-useable across features.
However I have no plans any time soon to implement other wiki-isms like auto linking or wiki markup or any of those other wiki features so if those kind of things are important to you then maybe mojoportal is not going to be the best solution for you. It is an open source project though so if someone else wants to implement a wiki its up to them. I speak only of my own intentions and where my efforts will be invested.