Men's Health recently stated that a glass of wine has the "Best combo of antioxidant activity and heart-healthy protective effects".
However, this Mayo Clinic article, which is much more comprehensive, states that all in all it's still alcohol and retains alcohol's detrimental effects just like beer/liquor.
It talks about many of the things mentioned in this thread:
Ultimately I agree with those that say to drink it every once in a while in moderation.
What I learned at Uni was any type of alcohol contains 7 calories per gram, but aren't really nutritious, like fats, carbs, or protein.