Who speaks for Rome?

Amy Sullivan brings us up to date on Obama-friendly words from Osservatore Romano, the latest being an interview with its editor, Gian Maria Vian, in which he expresses the belief that Obama "is not a pro-abortion president." I presume that Archbishop Burke, the Vatican's head canonist, would beg to differ. So yes, Rome sometimes speaks in different voices. But amidst what some are prepared to call a civil war within American Catholicism, it might seem to be a good idea for someone who speaks more authoritatively that either of the above to enunciate a position.