This sounds very similiar to Zazzle's You Design It store on
www.disneyshopping.com. I love Zazzle and I have designed several shirts for my wife and I, not only can you choose from TONS of images but you can also resize the image, add text and choose the color of your shirt(no dark colors though-sorry servo). Right now they have some fantastic new Wall E images to choose from.
This new store sounds awesome, especially if they will have park/ride/attraction/resort specific images to choose from...and dark colors of course, some designs just really "pop" on basic black or a dark navy.
When is the projected opening date? We will be back in early December, will it be open then?