There is an ongoing financial call between Apple and analysts right now. One of them asked a question about the iPad and Tim cook mentioned something about iPad mini with Retina Display shipping later in November. He might have also mentioned late November.
I'll be listening in tonight to review the financial call. I'll check back if there is anything new about this. I think we should get a definitive ship date from Apple next week, after the Air has had a full week of sale.
My guess would be 15th, two weeks after the iPad Air has gone on sale.