I'd have to agree with Pam, the real estate market in Sonoma has been impacted, but not nearly as hard hit as other areas of Sonoma County. And while I live in Sonoma and sell homes here, there are a number of great places in Sonoma, Napa and even Lake counties, that offer the wine country living that appeals to so many. Depending on what you're looking for - solitude, space, convenience to a city, rural, urban, farm land, horse property, vineyards, olives - you're sure to find lots of beauty in this part of California.
http://www.sonomacounty.com/ is a Sonoma County sponsored website to promote tourism here. Once people visit as tourists, some decide they want a vacation home here, or plan to move here for a lifestyle change. I know, because that is what I did ten years ago! In the past, Sonoma County was flying under the radar relative to Napa County but that is changing, as people come to learn about our wine country lifestyle and the bountiful farms and ranches with an emphasis on sustainable and organic products throughout the county.
So to answer your question the show may have just underscored a trend. The market for homes in the most desirable parts of the county has certainly been impacted by the housing crisis, but not nearly as much as in some areas of the country or more "suburban" parts of the county.
I hope that answers your question. I post on market trends and Sonoma County lifestyle and real estate news at my blog if you want to keep in touch with what is happening here, and I would be happy to answer any questions you might have!