More than 2 years after buying YouTube for $1.65 billion Google (GOOG) still seems to be grappling with how to monetize the site’s huge audience. One sign that this may ultimately change is the arrival of an even larger -- some might say larger-than-life -- presence on YouTube: The Vatican. Yes Pope Benedict XVI and the Catholic Church he oversees  often hesitant to adjust to the modern world kicked down the door to the 21st century with its own YouTube channel last Friday. It was mildly appropriate that on a day when Google reported earnings that exceeded Wall Street expectations the Vatican reached out ...