MacRumors are reporting that Apple told USA Today that demand for the new iPad has been ‘off the charts’ with the initial batch now sold out. "Customer response to the new iPad has been off the charts and the quantity available for pre-order has been purchased," Apple said in a statement. "Customers can continue to order online and receive an estimated delivery date." We reported last week how all the stores around the world that were accepting pre-orders had pushed their delivery dates back. Fortunately, we ordered ours on March 8 and have had shipping confirmation for March 16. Apple stores will have the new iPad available for sale on…