My June 11, 9am flight from Cleveland to MCO was "deleted". I just happened to check on Sunday 5/1/11 as well. They had moved us from the 9am flight that I booked on 12/2/10 to a 6pm flight. I would lose 9 hours, plus have to cancel ADRs, change car rental info, reschedule things at home...
I called and the customer service rep was typically not helpful. He said they "deleted" my flight and I could have a refund or change to the later flight.
I am so mad.
They also have a 7:15am flight, but of course that was full. I explained that it wasn't full when I made my reservation on 12/2/10 and that I should have priority to that flight over others who reserved later. He just said that the system doesn't handle it that way.
They never emailed me to tell me of the change. Why would they cancel a full, popular flight?
How can they give me my choice of seat when they can't even assure me of my choice of flights?
I emailed them through their website, but I am sure that will fall on the deaf ears of middle-management.
Better all check your reservations.