A great site to log wines you've drunk and share them with friends.
If you need maps of wine regions, this is your site.
Winex does the majority of its business online, but also has a physical store in Santa Ana, CA. Knowledgeable staff, great deals, and access to aged wines are a reason to check it out.
WTSO, or Wines 'Til Sold Out is a great site that sells one particular bottle of wine until it sells out at the cheapest price on the internet.