i would say the same thing as cb919 and add that LCD's are also subject to burn-in, just like CRT's and Plasmas, but the recent tv's are much better in this regard than in "old times".
one just has to not keep a static image on the screen for hours on end (or days), and also use the side masks when watching 1.33:1 programs (Std TV).
my kuro also has what they call an "orbiter"; it makes the image move around (in a circle) by very small amounts, a few pixels.
one is not aware of it working, but it softens any line or transition in the image that could "imprint" the panel.
