I would love to share some of the things I learned the hard way about developing a Mediawiki site. Me and dzyubam have put in many workdays into it already, and are very enthusiastic about the possibilities. However, many things are not straightforward.
If you would like to develop the Wiki, check regularly the new section: http://gmatclub.com/wiki/Dev
You may also ask me quick questions which I will be more than happy to answer to the best of my ability.
[w]User:Tino[/w] - GMAT Club Support
Ask me about the [w]Tests[/w] and all tech issues. Let me know if you find something broken or ugly on this site.