What is a reliable site to find ratings of wineries?
I'll be of age in a few months, so I've been keeping my eye on wine.woot deals for when I start attempting to refine my tastes. I have wine course book, but I don't want to hurt my taste for a certain type of wine by buying from a poor winery.
I guess my question is for the wine snobs: is there a reliable site that rates wineries? I understand that I can't exactly buy the expensive wines for a long time, but I'd at least like to know I'm not wasting my money.