Greetings,
After some discussion in the IRC, http://www.mediawiki.org/wiki/Project:Glossary has been setup to house MW related terminology.
Right now it's largely MW related terms borrowed from enWP's glossary. However, over time we should try putting terms commonly used on MW.org or in MW documentation on the Glossary.
An early example of entries is clarity on the terms "enterprise wikis" vs. "third-party wikis" vs. "corporate wikis".
Feel free to email me off-list if there are terms you'd like added but just don't feel compelled to add yourself. :)
-greg aka varnent
------- Gregory Varnum Founding Principal, VarnEnt Lead Administrator, WikiQueer Lead, Aequalitas Project @GregVarnum fb.com/GregVarnum