Field blends—wines made from assorted grape varieties picked and vinified together (as opposed to cellar blends, where finished wines are mixed)—used to be common in California but are rare today. You'll wonder why when you sample OAKVILLE RANCH NAPA VALLEY FIELD BLEND 2004, a juicy, fruity, vaguely Italian-tasting red made mostly from zinfandel with some carignane and petite sirah included. The winery recommends listening to The Iguanas and Lucinda Williams whilst sipping it. Well, okay.