Between his return Friday from Pope John Paul II's funeral in Rome and his meeting Monday with Prime Minister Ariel Sharon of Israel, President George W. Bush spent an hour and a half Saturday riding a mountain bike at his Texas ranch. With him, as usual, was his indispensable new exercise toy: an iPod music player loaded with country and popular rock tunes aimed at getting the presidential heart rate up to a chest-pounding 170 beats per minute. Which brings up the inevitable question. What, exactly, is on the First iPod? In an era of celebrity playlists - the New...
