Ok, chat wise... seems the Ajax Chat client that was being used is no longer being maintained (at least until someone steps up to maintain the vBulletin integration). A quick search around on vBulletin.org revealed several alternatives, one of which has been installed.

It is now living at the bottom of the forum page, it will be collapsed by default. It auto-prunes messages after 48 hours.

Let's see how we get on with it