I'd like to add that we're having some problems because of using RedHat. RedHat's TeX doesn't include CJK support, so the math mode on Wikipedia can't render CJK characters, in spite of this being possible on my home Debian machine. Recompiling TeX by hand would of course be the other option.
And Debian is somewhat more freer than Redhat, so it fits with the spirit of Wikipedia. Plus, it really makes life easy for administrators.