I emailed them and they said "We'll receive this item from our suppliers in time for the release date." so thats good news, obviously this doesnt indicate when but I think i will be keeping track of it so i can pre order as soon as its available, cant wait for this game.
I would think it's one of two situations. Either a) it's like the Loot Chest and only a certain number were made, with no more to be made following that. Or b) there's only a certain number of copies made for pre-order and more won't be made until after release date.
It's often the case with the Limited Edition copies, they don't sit around long before people snatch them up. Look at the Loot Chest editions, gone in less than a month of announcement!
My standard edition hasnt either but im using prime and its guarenteed for tomorrow so it should dispatch within a few hours for me, delivery can be fast if you have guarenteed once I ordered something and around 9pm and got it 10 am ish the next day. I think with a big release like this it has to dispatch now if we want it by tomorrow afternoon or evening