Are you traveling to the airport by car or home by car??
If you are traveling to the airport by car, then yes there is a service at the resorts called Resort Airline Checkin.
If you are flying American Airlines, Continental, Delta, jetBlue, United/Ted, Northwest, Alaska Airlines, AirTran Airways, or US Airways then you can get your luggage to the front desk of your resort between 5am and 1pm (but no later than 3 hours before your flight) and check in for the flight and check your luggage. You will receive your boarding passes right there at the resort and your luggage will be transported to MCO and loaded onto your plane. (All adults must be present with photo ID)
You won't see your luggage again until the carousel at your home airport.
You can then get to the airport any way you see fit: drive yourself, taxi, or Disney's Magical Express.
If your carrier charges for checked luggage or excess luggage, you can still utilize the RAC desk. Simply call BAGS (the company that operates the RAC desk) prior to checking in at the desk. You may pay your fee over the phone using your Visa, MasterCard, or American Express card. (You can find the number for BAGS listed on your DME paperwork, or by dialing 0 from your resort telephone).
Think of it as curbside checkin, but the curb is 30 miles from the airport, so tip accordingly.