Thanks! I should be a bit more specific - This is a site for a small university school. We need to provide material for students, for ourselves, and for other researchers. it isn't reallly a Wiki problem.
What we need, that pretty much every CMS on earth supports, is the simple stuff:- site updates, access control, many users can edit the site, different types of page, for example, courses, research projects, staff members, and so on.
Our specific need that no CMS of my acquaintance supports, is the ability to enter publications data directly from databases like PubMed. I can do this in Perl, hence my interest in a Perl based CMS. If didn't need this I'd probably go for Joomla, the CMS formerly known as
Mambo. Hope this helps.