HERE in the heart of the Côte de Beaune, the epicenter for white Burgundy, vignerons in their cellars are offering samples of their 2010 vintage, which is aging in barrels, and pouring tastes of their 2009 wines, which for the most part have just been released. But if you love white Burgundy, lean in close, because I’d like to whisper a suggestion: stock up on the 2008s.