MacRumors readers and TUAW editor Steve Sande are reporting shipment notifications for the spiffy new 27-inch iMacs. A quick check reveals credit card charges have gone through (ouch) and the delivery status has been changed to "preparing for shipment." Additionally, the cancellation window has closed on these early pre-orders.

If you've been wondering when to start obsessively watching for the FedEx truck, now would be the time.