My LHS told me the same thing as Mike said above, Nov 30th.
Not sure I understand the rest of your question? I am guessing the LHS's need to have their orders in by around that same date if that's what you are asking?
I usually always pre-order, but a few times I have found something I wanted after the pre-order date (like un-cataloged items, or just missed something in the catalog) and so far my LHS has always been able to get the item for me. They have to call MTH to see if it can still be ordered and if so they order it for me. However, I imagine there will come a time when this won't work out so well.