I've spent at least 20 hours in the past week optimizing UB as much as possible for search engine optimization (SEO), and have pretty much gone as far as I can.
However there is a great package out there made specifically for vBulletin that goes above and beyond what I can do by hand.
This might be far off for now (not really making anything from sponsors... most sponsorships are free in exchange for advertising), however I thought I'd throw it out there and see what happens.
It's called vBSEO and more information about it can be found at http://www.vbseo.com
It's $149 though, but it's a one time fee for life.
I personally vote we raise money for it by throwing a United Bimmer Bikini Carwash, featuring the ladies of UB and witeshark, all wearing bikinis.