This is a bit long for a Lazy Sunday post, but since not everyone is interested in social media as part of their winery marketing program (Lazy Sunday being reserved for things which some readers may find less interesting), I'm leaving it here. It's OK to read it on Monday.
Of course, CellarTracker may be the best example of a popular, wine-related social media site. If you're curious about what real people (not critics, but wine enthusiasts nonetheless) are saying about your wines, CellarTracker can be an enormous resource. Go to the CellarTracker home page and search for your winery (e.g. Emeritus) in the search box at in the upper left corner (under the CellarTracker corkscrew logo).