The code for this Sandbox Wiki is now hosted at Google Code as an example application for another library called urminer. Most of the Creoleparser stuff are in these modules:

http://code.google.com/p/urlminer/source/browse/examples/wiki/wikiparser.py

http://code.google.com/p/urlminer/source/browse/examples/wiki/macros.py

Note that this wiki is running the trunk version of Creoleparser (or close to it), so the code may not be compatible with the current release version.