Hey Mike,
Good luck with
Project Shirt LLC: Vintage, Grunge and Funny Tees. There is a lot of potential for custom t-shirt sales online.
I like where you are heading with the dark design. What you need to look at in a t-shirt site is first the navigation. Because of the various genres of t-shirt messages, navigation should be a primary concentration.
I think we can bring out the design a lot with an edgy logo and a dynamic flash intro image. This will draw attention to the site as a state of the art t-shirt provider. The navigation then should easily move the user to the items of interest.
Adam Sieminski