I had an apple gift card. Wanted them to use that up and charge the difference to my credit card. They managed to botch this and my order was flagged (Redlettering telling me to call in)
I called in, had them rerun and it cleared. Got an email titled: Your order is on its way.
"Thank you for your recent order with the Apple Online Store. We appreciate your business.
Action has been taken on your order and we will continue processing it. Any prior communications requiring action can now be disregarded.
To check order status at any time, go to apple.com/orderstatus. You will need to login to your account with your Apple ID to locate this order.
We apologize for the inconvenience."
Order still listed as in process... not sure how soon after a charge they actually reprocess and actually start preparing for shipment....