Out of curiosity, would you consider putting the original skin as an option for those of us who use the default dark/light icons to tell if a forum has new posts?
Besides, if all we did was click "what's new," there'd be no point in subforums or custom icons in the first place!
I might be in the minority, but I'm not a huge fan of mixing fonts, styles, graphics, icon sizes etc, and I think it will make the site look messy and possibly distracting. Vendors having their own logo/ident for their forum is one thing, but I would at least suggest making sure icons are the same size and possibly developing some stylistic/ident theme for the other (non-vendor) sub forums that will match the identity of the site.
That's just my opinion, and I will continue to visit here regardless.