Everyone should listen to @pdworkin. Yes, there is data saying that people that drink red wine have longer life spans, but there is not enough data to say which direction this correlation goes (as in, is it wine=longer life, which is what most people say, or is it that those with longer life spans happen to drink more wine? Or, another possibility, that it’s just a coincidence).
So, the answer is “not enough data”. Really, anyone who says that it does is going off of hearsay. Even antioxidants do not have proven effects, all hearsay, not enough data. The currently booming industry of health drinks would like you to think otherwise, of course.
That being said, there is pretty much no evidence to say that drinking it in moderation will hurt you, as far as I know, so there’s probably no real reason to not do it. In moderation, of course.
also, @La_chica_gomela, you should read that article on Resveratrol. It clearly states in the first paragraph that most of the health qualities ascribed to it have never been replicated in humans, it has not extended the lives of mice in any trial, and the only thing is has been observed to do in humans, lowering blood sugar, happened at very high quantities. Much more then the amount in quite a few bottles of wine, so it really can’t be the cause of the possible health benefits.