Once each year we ask a group of five retailers to nominate between six and eight red and white wines they believe represent exceptional value in this category. From their nominations, we settle on 25 reds and 25 whites for a panel of experts to evaluate in a single, blowout, blind -- no labels visible -- tasting. The 50-wine roundup we call Plonkapalooza, now in its fourth year, continues to provide insight into where real value can be found among inexpensive wines -- and deliver a surprise or two en route.