I really like that second black shirt. If you could incorporate BuellXB.com somewhere, even if it's small or just on the back of the shirt, that would be sweet.
@GatorBuell - I like your idea. I've seen a number of forums that have set up "Premium Memberships" with all sorts of perks to go along with it. The premium package might cost right around the same as the cost of the shirt + shipping, but would also include other benefits.
I still think I would come up with some system to give out free t-shirts for reputation, post count, contributions (design, video production, blog articles or interviews, links, moderation, etc.)