Just added to
MediaWiki.org:
http://www.mediawiki.org/wiki/Extension:WorkingWiki
WorkingWiki is a software extension for MediaWiki that makes a wiki into
a powerful environment for collaborating on publication-quality
manuscripts and software projects. It's designed for research labs'
wikis, but may have diverse other uses as well.
(I probably should have made it public long ago, but there was a big
refactor and it took a long time to settle out...)
Lee Worden
McMaster University