I recently bought some fabric from Marcy Tilton's website that she calls Light on Water Shibori Microfiber. I decided to use it with my TNT t-shirt pattern, but to also use a neckline technique from Marcy's t-shirt CD. You can use this technique on any t-shirt pattern, which uses oak tag templates that you make using the original pattern.
Unfortunately, I didn't have the t-shirt seated quite evenly on my shoulders, but you can still see the effect.
I am wearing this t-shirt with Sewing Workshop Trio pants, which I will review separately.