I got this from Dell today on my Dec.03 order..

"Thank you for contacting Dell Customer Care.
Our records indicate there is an unforeseen shipping delay from our manufacturer on order number xxxxxxxxx. The manufacturer's estimated time of availability is December 18, 2007. Unfortunately, we are not able to expedite your order. However, arrangements have been made to contact you once the product does ship, to provide you with the Purolator tracking information.
I do apologize for any inconvenience this delay may have caused."

Either it was an unexpectedly high demand, or a product refresh is in the works..

Cheers
Harold