Jean-Christian Imbeault:
I've only found one other wiki that purports to
support ACLs but it
really doesn't look nor seem to be as good (in other respects) to MediaWiki.
Have you looked at MoinMoin?
http://moinmoin.wikiwikiweb.de/
http://moin.sourceforge.net/
It supports ACL's and AFAIK it's a very reasonable wiki engine.
--
Regards / Groeten,
http://www.leren.nl
René Pijlman
http://www.applinet.nl