I have just written an extension that uses Steven Chan's PHP scripts (http://www.jcphysics.com/ASCIIMath/) to convert a relatively simple markup language into MathML. The only problem now is that it needs to be presented as XML - currently the output is just displaying as simple text. I remember reading something about mediawiki and XML format, but can't find it again. Is there any simple way of making mediawiki display MathML, or would it need a major rewriting of mediawiki?
I am new to this, but there is some guidance on setting up something for PmWiki using javascript at the following http://www.pmwiki.org/wiki/Cookbook/ASCIIMath. I don't know how it would apply to mediawiki.