I think a wiki "knowledge base" is a good idea.
Jay was at one time planning to extend the fan project wiki to include articles on the various sources (so, for example, we could list the various nuances for each SW laserdisc release). This was never implemented, and interest in developing the wiki has waned.
There was at one time a site (wiki.dvdholocron.com - you can check the remnants out on web.archive.org) that listed Star Wars fan projects on a wiki. It became quite popular, I'm guessing because it used the MediaWiki platform which many people were familiar with from Wikipedia.
However, the site only lasted a few months, I think the fact that it included download links led to it receiving a C&D from Lucasfilm relating to daveytod's The Clones Revealed.
It is true that Jay did once say he didn't want CRC's posted becasue of the implied link with downloads, but personally I think this is being overcautious.
How about I attempt to install MediaWiki at moth3r.heliohost.org? The site's on a free host so access can be a little flaky sometimes, but we could put some articles up as a test and if it's a success maybe badger Jay to port it over here.