This post from Josh at pinotblogger (AKA Capozzi Winery) shows why:
...from a producer’s perspective, the fact that there is no [RSS] feed for all reviews of a particular wine is a huge negative. It would be very useful to know instantly when someone has tasted and reviewed our wines. If it was great, I could amble on over to their tasting page and leave a little thank you and invite them up to the winery. If it was horrible I could run like greased lightning and try and find out if the bottle was corked and offer a replacement.
In other words, RSS helps you find out when people are talking about you (and lets you act on that information, as Josh does a good job describing above). That's one of the reasons you should set up a "search feed" (a search which generates an RSS feed that updates daily) for the name of your winery at Technorati, PubSub, or Google Blog Search.
I'll bet Josh has one!