I'm taking care on Biology Department of Warsaw University wiki. It's connected to CAS and has some special features like: protected pages and protected files, both using passwords.

I've managed also to make mhchem work with texvc that allows using simple \ce{} for displaying chemistry formulas within mediawiki. Take a look at the bottom of site: http://wiki.biol.uw.edu.pl/w/Wiki:Brudnopis

If You are interensted in this patch: contact me,

 z a s [remove me] n u [remove me] t y [at] g m a i [remove me] l  . c o m