Americans are sipping more Shiraz and pouring down more pinot than ever before. You can chalk it up to a few things...the movie "Sideways", marketing making wine more approachable, and a glut of grapes that's made the stuff cheaper in some cases than bottled water. U.S. wine consumption has nearly doubled in the last 10 years. And as more of us come to the table, some wine connoisseurs and merchants are worried that a lot of what IS on the table is starting to taste the same. Marketplace's Brian Watt reports.