I got a room at the Hampton Inn right by the airport for $49 including tax at www.orlandodiscountrooms.com ...they have others besides the Hampton Inn though. I wanted the Hyatt inside the airport but it was way too expensive for a one nights sleep.
They do have a AAA discount and sometimes other promotional rates. Flight arrival/departure times are available and updated regularly on your room TV. We were able to get an extra hour sleep by staying right in the airport terminal and not worry about catching the airport shuttle at 4am. After we woke up (showered the night before) all we had to do is gather our last minute items and take the elevator downstairs to the TWA counter. I would do it again in a hearbeat if we have an early early flight.