I just got one of those Home Theater System in a box (SC-BT303.) The Amazon video on demand is GREAT, very simple to setup and HD movies look great. Not bluray quality, but it sure beats having to wait in the mail for the next batch of movies. I really like that you can stop a movie go on a grocery run or whatever and come back and start off at the same point through the your library.
Movie selection is great and there are even tv shows. Not to forget to mention that these viera cast units also do youtube.