I didn't realize the first time you showed this on the blogs that what I thought was the front of the shirt was actually on the back and vice versa. With corrective lenses in my mind now, 5$ all the way man, since if someone sees the front of the shirt first it just looks like a random yet awesomely-placed pattern, until you turn around and the previously alien shape turns into something you've looked at every day of your life.
About my design
you can see a large image of the full design that is used for both sides by clicking this link
thanks to randy for his most excellent shirt templates.