Mechanism for elevating TV from behind unit - help please!

Hi
Does anyone have any good ideas for hiding a flat screen TV? I have already considered putting it in a large unit of some kind.
I had also thought about having it behind a large sideboard with some kind of remotelly controlled mechanism for elevating it - anyone know what that is called or where I could get one? Or would I only get that ready built-in?
Thanks for any advice!
Jac

at a guess it will double the cost off your tv to have the raising mechanism

http://www.activateddecor.com/

I had a quick search and you're right - cheapest I could find is £210. But may just have to save up my pennies for it.
Thanks,
BB