If you are staying onsite, you can use Disney's Magical Express service, which is a bus that takes you to/from the airport (currently free).
You get special luggage tags (from what I understand) and you don't need to pick up your luggage at the airport. You just get on the ME bus and when you get to your hotel, your luggage will be waiting there for you.
My
travel agent at
AAA said she spoke to Disney today to see why we haven't received any ME material yet, and Disney said there was a delay in printing a "Transportation Booklet" and they will be FedEx'ing the ME materials when they are ready.