We got our Disney mail like a week or so ago. It's soo exciting especially to see if they changed the luggage tags they give you. They had changed the design this year which i am greatfull for. They also give you 1 free refill per person now which is a great $$ saver when you buy the dining plan.
Mine arrived today as well, I thought I was 40 something days away - but, I just counted, it's actually 35 days away - that suddenly feels very close ! I suppose I'll get Mickey mail II in 3 or 4 days for the second part of our split stay.
It's a 5x8 envelope from Walt Disney Travel Co. w/ a drawing of Cinderella's castle on the left side of the envelope, blue on top,, a pix of Mickey and a little kid on back. Inside is a voucher book w/ your vouchers for your package, decorative Mickeyesque luggage tags, and if you are taking DME, bright yellow luggage strips that you put on your bags so that they magically end up in your room after you check them at your departing airport.
It means your trip is getting very close, hence the fun/excitement at seeing that very distinctive envelope in the mail.