My order was placed yesterday (16/10) in the UK and it was showing the same delivery as everyone above (7 days, by 3rd Nov). Today I had an email from Apple saying there was a problem with my card authorisation, and I should contact my card provider (in this case Amex). Having contacted them 3 times now, I'm assured the charge was authorised the first 2 times Apple put it through.
Bottom line - there is CLEARLY an issue between Apple and Amex's systems, so if you paid with an Amex card you may want to give them a call. At one point I had both Apple and Amex on the phone, with Amex confirming it had been authorised, quoting authorisation numbers, and Apple insisting it hadn't! I strongly suspect Apple has a system problem here and, as per usual, refuses to admit it or do anything about it.
Apparently they now won't do anything about it until Monday, at which point I shall be on the phone raising h*ll to anyone that will listen!
I have to say *every* order I've ever placed online with Apple has been a farce. Retail stores are never an issue, but they supposedly aren't getting the 2.8ghz MBP's at all... and don't even think about changing from the stock (5400rpm) drive.
So for now I'm stuck. I hope everyone else has better luck!