I'm working on an extension for WikiHub that will allow users to create new wikis from a special page for their convenience.
I'm working on a script here that can handle the new wiki creation.
I've also outlined the features of the extension on my development website and plan to include a method of tracking what wikis have been created and wiki creation by user. I don't think this will be implemented as a standard MediaWiki log, but as a database query from a special page that will gather all wikis created by a given user or by all users.
To simplify tracking of wiki creation, I will make the special page only accessible from a central wiki on the farm that will be designated as the main wiki where new wikis can be created from. For some farms this could be the community or meta wiki.
This post was posted by Lieutenant S. Reznov, but signed as Inquisitor Ehrenstein/Александры реактион.