The latest Liv-ex 100 fine wine index data for November has been published for November 2008 and it shows virtually identical performance for the month to the Dow Jones Average and continued outperformance on a longer term basis. Here are the stats:

For a graphical comparison over the last year as well as the past four year period, please see the charts below:
Bottom line: Fine wine is an attractive investment class. As with stocks, one can try to pick the bottom but most professionals will tell you it's hard to do and not to bother. If prices are attractive, then act on them now before prices recover.
P.S. Here's another good story from the International Herald Tribune for more commentary on the price resiliency of fine wine: "Wine Investing 2009: End of the Madness."