Yes, I know about Sonny Chiba. His best known are "The Streetfighter" and "The Bodyguard." In fact, the movie that Kevin Costner's character was watching in "The Bodyguard" was "The Bodyguard." Chiba is a great martial artist. I don't think his English is so hot though, so he never had a much of chance to take a shot at making any martial arts films in America. He was in a movie with Roddy Piper once, which had potential, but it sucked overall.
I didn't care for the hokey martial arts in "The Matrix" and I'm not a fan of that movie.
As far as actors doing martial arts in films, Mel Gibson was convincing in "Lethal Weapon," but the difference was that the martial arts were not the focus of the movie. Sharon Stone also pulled it off in "Total Recall," but that was just one scene.
The Matrix started the trend of putting a lot of martial arts in films, and having regular actors train a little and do the fighting. The previews for "Kill Bill" show Lucy and Uma jumping all over the place in what looks like samari outfits.
Just an opinion, but I say **yawn**