.Whimsically wonderful Ryo Ishikawa is back on US shores, and not a moment too soon. While the PGA Tour struggles with a simmering scandal and a weighty rules issue, the young Japanese champion will bring a welcome breath of fresh air... and a rainbow of riotous color... to the 2010 Northern Trust Open later this week. Ryo actually arrived several days ago, to indulge in one of his all time