It doesn't seem to say if I can again limit this to Sysops only.
Am I missing it?
er...if you want a site that only a handful of people can edit, why use a wiki?
If you want to limit who can edit, just don't give people accounts. they can still view the pages. What function would 'ordinary' users (logged in) have in your system? if none (can't edit....what reason to be a user then?), then just don't let them in in the first place:-)
perhaps I misunderstood (and missed earlier posts)?