Hi, I had ordered my 13/256 on Aug 7 with next day and I got an email saying it was shipping and it will arrive on the 18th! I've been a Prime member for about a year and I always buy stuff from Amazon. Brought a Kindle just for this offer but after seeing the other offers I think I will keep it.
My thoughts on why Amazon pulled the Apple laptops is that originally it wasn't an error to include them in the offer but the demand was so high that they couldn't keep up with demand and they probably figured it was easier on customer service to remove the offer than keep people waiting months for their computers. The fact that people were selling codes online probably didn't help either. I'm sure their goal was to generate Kindle sales and I think they had achieved it.
Good luck and I'm sure all that got their orders in will start seeing shipping dates!
hope!