last I heard SW hadn't actually been released in HD yet and the TV networks that have been (saying that they are) broadcasting it "in HD" were really just providing an 'upscaled' version of the standard DVD feed, just like you would get from watching the standard DVD's in a playstation3 (or any upscaling DVD player). I could be wrong, but I don't think Lucas has released an HD version for broadcast, because, to do so would spoil the market for the inevitable bluray release. normally george is very careful about that kind of thing
but I haven't read the promos about this spike TV run, so I don't know.. maybe it really is HD this time. (I doubt it).