I felt a little guilty about suggesting we share more when I realized that we had discussed this at our December meeting and that I had never followed-up.
We have developed a metadata extension for MediaWiki that some of you might find of interest. In December we were developing a Dublin Core extension for Mediawiki. We have since switched that to a IEEE LOM based tool. The only piece of this that is not totally generic is the "coverage" element.
For anyone that is interested you can find it here: http://it.extension.org/wiki/BettaMeta
It is very new and we have not listed it on Meta just yet. We will get that done.
Kevin