We just gave up on this. We serve professional photographers, who tend to be above average in terms of techie-ness. We implemented PB Wiki for our support page

We just gave up on this. We serve professional photographers, who tend to be above average in terms of techie-ness. We implemented PB Wiki for our support pages. No one updated it. We spelled it out in big letters on the wiki home page. No one updated it. We even had a contest. Every time you add to a wiki page, you're entered to win a prize. No one updated it. Not only did no one update it, it confused customers. Customers confused the "login" link at the top of the wiki with the login area of their CMS. That simply resulted in more support tickets. So, this year we simply moved our support pages to WordPress and only our staff can update them. Since it appears your wiki is internal, maybe you have a better chance, but it would take some serious staff development in my opinion.