That notebook site had me spinning in confusion, but I can't stand default layouts either. I do like the familiarity of the basic forum design, but using the vB default style is just too unimaginative and boring. There are too many sites using it, especially in the vBulletin genre of support forums for vB.
My own vB forum has a custom style, but it is not a one-of-a-kind. I've added some custom touches and added some of my own graphics that blend with the style though, for a more unique look. It's also the only style available to my members because I believe in a branded look. I'm not about to spend the enormous time and effort required to customize more styles for people who spend precious few moments on the site.
So c'mon, Brent, live a little on the edge. Even if you don't change the style, at least change the color scheme to something a bit more unique and design a logo that really "zones in" on your theme as the vBulletin Zone for Webmaster Resources. The most well known zone is the Green Zone -- noted for friendly and secure. Capitalize on that and brand yourself with a logo and icons that reinforce it -- and don't forget the favicon. You can keep it simple and brand it at the same time.
The vB Zone -- the spot every vBulletin Webmaster will want to be.
Jim