Cheers to CES realizing a vBulletin forum is for chatting and a wiki is so much more powerful !
However, you also should get a good CMS to go along with your vB forum site.
Yes, vB + vaultwiki makes a site more useful than just vB. For sure.
But at the end of the day, a site needs some non-forum, non-wiki pages.
How about getting Joomla! and use the vBulletin user integration plugin: jfusion.
I am sure you guys know Tigratus ... ask him about jfusion.
One testimony that your site is not well designed to sell products ... is I have a hard time finding the "Product Home Page" http://www.vaultwiki.org/ for vaultWiki.
Maybe you need a link to it on the right hand side under The Vault > Products ?