Just saw this in the mathjax discussion:
http://en.wikipedia.org/wiki/User:Nageh/mathJax
which arguably would allow one to reskin one's Moodle Docs (mediawiki) account to afford one access to mathjax and jsxgraph.
I did a quick test and was not successful but frankly I am not sure how HQ cobbled up the user pages as it looks like there may be a separate user page for each version of the docs (yack) and I do not have the time to play at the moment.....
At the same time there is work being done to incorporate MathJax formally
https://bugzilla.wikimedia.org/show_bug.cgi?id=31406
and one hopes that access to mathjax and jsxgraph will eventually be simple to manage without using greasemonkey or such.
Moodle Doc users who have a Moodle Doc account (free to all) can now select MathJax from their user preferences at the bottom of the Appearance page
By the way (I suppose I should not hgide this here, but what the hell), Moodle Docs can now also support ASCIIMathML with a quick tweak
Now that MathJax has an input jax for ASCIIMathML (http://www.mathjax.org/docs/2.0/asciimath.html) , all that needs to happen is that appropriate delimiters and appropriate Hub configuration be set in the MathJax wikipedia plugin
Presently, the plugin uses the Tex-AMS-MML_HTMLorMML.js configuration file. The Devs need only alter the configuration file Tex-MML-AM_HTMLorMML.js and ASCIIMathML will work throughout Moodle Docs.