Wow, no export / import functionality to the wiki. Well, that answers my question on if I should use this feature. The answer is a very loud NO.
Wikis are pointless if the students don't have the ability to export and import to a mediawiki site (or other equivalent site) at a later date without having to copy and paste every single page.
I can understand not wanting to export specific user info, but that can simply be accomplished by exporting only the most recent version with the author just being the course name that export came from.
I also don't like the fact that I cannot easily make an assignment of "Create/Work on wiki page George Washington" and have it go to the appropriate wiki page by the student simply clicking the link.
This wiki activity does not work at all the way I would expect / want a wiki activity to function.