Orlando must be a popular city.
Airtran just announce today that they are adding 1x daily service to MEM-MCO. Look like Airtran is trying to help out it FF partner.
From what I have heard in MEM, that the casinos (in Tunica) really push for that flight to LAS and the time spot too. Only 1 nonstop flight a day. Casinos execs can leave MEM and get to LAS a little out midnight and be well rested for work later that morning, and for the execs that leaving LAS can hop on a plane and be ready for work when they get to MEM that morning. So I believe this will work unless NW do something like they did in MSP.