Just thought to calm any preorder newbie nerves (i know i had them the first, second, third, fourth time) once you get that *email confirming, your order is placed. So relax a little and have a deep breath. On order page once your item goes into 'preparing' your order is as official as it can get and now you can just relax! It wont change again until the item is packed up ready to be shipped a few days before when you were told you'd receive it. Thats roughly when the money will get taken too from the account.
You might have had a pre-auth for the whole amount of money go from your account (it will come back again in a few days its just how retailers check you have the money) or you may not. Either way, nothing to worry about. I had a pre-auth but for £0.00! So really, we are all generally safe with those orders now, relax, go back to life and look forward to the 25th.
*if you haven't had that confirmation email there are several posts here telling you how to chase that up via automated phone line.
Chris.