A few things:
While your delivery date was estimated as Dec. 8th, the vast majority of orders are being given a date of Dec. 23rd. In fact, I've read dozens of accounts of customer service representatives confirming the latter date.
Microsoft has been making pre-authorization charges to accounts that have ordered. This is normal, as they want to ensure that ample funds are available before moving ahead with the order. Keep an eye on your account, though, because many people have experienced
multiple pre-authorization charges, causing some accounts to dip into negative funds. Personally, I've been charged and then refunded at least three times for pre-authorization.
This certainly isn't ideal, as many other online marketplaces have been able to ship their stock by the promised delivery date (I was told Nov. 12th when ordering from the MS online storefront). The real issue is that MS misled consumers by claiming to have
rapid delivery available for in-stock consoles; in reality, consoles ordered on release day have likely not even been manufactured. That, and the fact that thousands of dollars of funds are being drawn from accounts for products that won't be sent for many
weeks.
[end rant]