The T-shirt is the ultimate canvas for self-expression. The Ts been printed, shredded and pinned, laser cut even, and now thanks to Cute Circuit, the Tshirt has been digitized.   Meet the TshirtOS. It's essentially a wearable platform with a flexible LED display that connects to your iphone, opening up a whole host of fun and expressive opportunities.   The T can display your tweets, play musi…