Hi Gang, I've been calling the phone status line and checking the OC website every day (sometimes more than once a day :-)
Yesterday (Oct-21) the phone status went from "waiting production" to "in production" with an estimated completion date of Nov-03 while the OC website hadn't changed.
Today (Oct-22) the OC website was updated to "in production" and the order details updated with the VIN number (but no estimated completion date while the automated phone status didn't have the VIN).
So, 1 day delay isn't to bad, I'll keep checking both sources as my M5 moves through the pipeline and update this thread.
Brutus