Okay, as some of you might notice, everything's new. I've upgraded the site to vBulletin 4. I was hoping that it would be a long slow, careful upgrade, but I had to do it quickly because of today's hacking.
Regarding the hack, from what I can tell, it was some kind of automated hack that inserted hidden banner code into the site's template. This was designed to generate advertising revenue for them based on traffic to BAUT. It's a pretty low-risk hack, from what I can tell.
I've upgraded vBulletin to the latest version, reverted all the site templates to their default versions. This should both close up the exploit and remove the hacked code from the website. Please let me know if your Nortons, etc are still being triggered.
Of course, now we're upgraded to vBulletin 4, which is going to require tweaks and fixes. So, hit me with them and I'll start working through them.