Just for the record: if anyone is considering a Plasma TV bear in mind that screen burn does happen. When buying mine early this year almost all the press were saying that it barely happened with old models, and is the same a CRT for the latest generation of Plasmas. Well with pretty light use (we don't even have cable!) my Plasma is already showing a faint impression of the xbmc menu + pause/ progress box during power-off.
This is no big deal for me it was caught in time and I set the xbmc screensaver to stars with a one minute delay. The default is dim (to 20%) after three minutes which obviously was not doing the trick.