In some ways, it's a most natural shidduch. There's Michael Chabon, the Pulitzer Prize-winning novelist whose best-selling 2007 book, "The Yiddish Policemen's Union," marked a turning point in the author's growing exploration of Jewish themes in his fiction. And Joel and Ethan Coen, the maverick filmmakers whose Jewish sensibility has been evident in countless of their movies, but who have yet to fully actualize their Semitic humor in a full-blown Jewish film. Until now. Late last week, the Guardian revealed that the Coens had agreed to write and direct the film adaptation of "The Yiddish Policemen's Union."