I was waiting for a working hack like this one before installing MediaWiki, and it's working exactly as I had hoped. Big thanks for putting this together, and for making it so easy to install.
I have one suggestion, when the hack creates the new wiki account based on the vbulletin credentials, is it possible to automatically populate the email address in the wiki account based on the vbulletin account's email address? It seems clunky that users have to re-enter their email address again in the wiki environment. I've disabled email authentication (using $wgEmailAuthentication = false; in localsettings.php) so they at least don't have to go through the email confirmation process a 2nd time.
I'd also suggest that if people only want their vBulletin users to be able to edit the wiki, so set: $wgGroupPermissions['*']['edit'] = false; in localsettings.php.
This hack along with
this hack to give the wiki a vbulletin feel have made it pretty straightforward to have a MediaWiki installation fit in very well with a vB installation. My forum is at
www.ninjette.org, wiki is at
wiki.ninjette.org.