I believe Chief makes a fold up ceiling mount for plasmas. Obviously if it can hold a plasma a LCD will not be an issue. But check out the major players, as either Inca or Chief have what you are looking for.
Alan
"This is a Christian Country,Charlie,founded on Christian values...when you can't put a nativiy scene in front fire house at Christmas time in Nacogdoches Township, something's gone terribly wrong"