http://www.woot.com is a website that offers one random (usually electronic) item for sale per day. The thing that makes it great is that that item is usually heavily discounted. Popular items sell out within minutes of being posted.
Now in beta is http://wine.woot.com/ – same concept except change the day into a week and have every item be wine.
Cheap wine by mail – if that isn't American then I don't know what is.