Just FYI to anyone who isn't worried about not receiving their DME STUFF!!
I called DME today and apparently my reservation was never saved and we are leaving August 10th, in just 13 days! I know I booked it because I made a special call after we decided to fly instead of drive and I even recorded the name of the representative I spoke with, but it was never saved or made official! It was even on our My Disney Vacation profile/reservation, so I wasn't worried until we got past the 21 day mark and still had no information.
Thankfully, the agent I spoke to today was very helpful and understanding about the situation. She assured me that she was printing my information immediately and that I would receive it sometime this week or early next week and apologized for my inconvenience.
So I guess what I'm getting at is that sometimes you need to worry about not receiving your luggage tags and booklet because it could be more than just a mailing error.