I recall Mike Phillips (from Meguiar's) being asked this, and from the sounds of things (up to where the posts ended) Meguiar's doesn't hand out too many banners. They like to make sure that the person showing the banner is in fact using only Meguiar's products so nobody is capitalizing on their name unfairly. This makes sense to me, but I'd guess that if you were willing to spend the $$ most companies would be willing to part with some sort of banner, maybe just not an "officially authorized" one.
Speaking of which.... Where's the "officially authorized" Poorboys World banner? Or PAC? Or 4Star? Or Detail City even?
What a missed market! :notpossib