Just saw this tonight, and really liked it. It's the new movie from Alexander Payne (Election, About Schmidt)
It's really well written, very funny and poignant. Made me wish I knew more about wine than I do, which is absolutley nothing. Great performence from Paul Giamatti, and Thomas Hayden Church in a supporting role. The actual wine tasting scenes with Giamatti and Church are great. I'd put it in my top movies seen this year along with Garden State and Eternal Sunshine of the Spotless Mind.