If you are looking to keep up with the news of the wine world Wine Science News might be the place. Its in beta at the moment - a better name might be Wine News as there is a lot more news than science. Apparently a product of the wine magazine Decanter, it looks like an interesting addition to the world of wine with sections on viticulture, wine making, wine business and, of course, wine drinking!
Another site for news is Wine Business Online.
Mike