I know the feeling. I put my trade in order on Oct 4 and I still dont have any of the shipping materials. I went to Verizon today and they said they are still honoring iphone's at 200 dollars until 31th. I might just trade in my phone at local store instead of mailing it in.
I did mine at the end of September and just received my shipping materials on Friday. I wouldn't worry if I were you, they'll come.