I'm just updating our wiki to the latest mediawiki version. The wiki will be down for the next 30 minutes but should work again after that. This thread will be updated as soon as the upgrade has been completed.
EDIT1: we now use a syntax highlighting extension for mediawiki. Good find Atomic! Check out examples here:
http://www.mediawiki.org/wiki/Extension:SyntaxHighlight_GeSHi#PythonExample article at the PARPG wiki:
http://wiki.parpg.net/Coding_Standards_and_Best_Practices#Coding_Best_Practices