What's to become of rich if exacting traditions as generations pass? More importantly, what's going to happen to the sushi? David Gelb's documentary Jiro Dreams of Sushi touches upon questions both philosophical and quite tangible in presenting 85-year-old sushi master Jiro Ono to the world, or at least those few who might see this film in one art house or another. Mr. Ono has long enjoyed a measure of fame in his native Japan, where he has been dubbed a national treasure. He's also gotten the attention of discriminating diners from around the world. His small, 10-seat restaurant, Sukiyabashi Jiro, operating from the unlikely location of a Toyko subway station, was given a 3-star rating by the Michelin Guide. Such a rating is apparently meant to imply, among other things, that an establishment thus rated would justify travel to a country for no other reason than to sample it's fare. All who partake of Jiro's sushi-only menu would s...