I called Onsale.com
The interesting thing the rep told me was that they were set to receive 50 units as early as the end of September, with a confirmed small replenishment of stock (10 more) in early October. They mentioned that only those that called in orders would be placed on the "priority list" to get the first batch of players.
Of course, it could just be a ploy to order over the phone, but I'm happy to oblige if it will get me the player even a bit sooner. At the same time, if the shipping schedule gets pushed out, or I find a better outlet, I'll just cancel my order.
I've had good luck with PCMall in the past, let's hope that trend continues.