Irish-American AutobiographyIs there still a distinct Irish identity in America? This highly original survey says yes, though it's often an indirect one. True, the age of heroic immigration is over, and today the term "Irish American" almost always means an American of Irish descent. If the Irish long ago ceased to be America's largest ethnic group, they've nonetheless stayed among the most visible (not least because St Patrick's Day has been adopted by the nation at large). But