http://www.nytimes.com/2004/01/04/movies/04RICH.html?8hpib
The New York Times has a review (Jan 4) by Motoko Rich titled "Hollywood's Land of the Rising Cliche", which discusses stereotypes of Japan in recent American movies, including the stereotype of the samurai as the embodiment of all that is good and noble about the warrior. She remarks that the view of the samurai in Japanese movies is somewhat more critical, and sees them as more corrupt than a lot of Americans do. (The ideals of the samurai were, after all, parlleled by the Western medieval ideals of chivalry, yet no one believes anymore that Western knights necesarily lived up to those ideals. Obviously some, such as the famous Chevalier Bayard, did, but they were the exception rather than the rule.)
Interestingly, she says that the Japanese had fewer problems with Kill Bill, since, although most of them do not share Quentin Tarantino's fascination with Grade B action flicks and yakuza films, they at least understand where Kill Bill is coming from.