Vinography: A Wine Blog provides a handy list of wineries that maintain blogs. See the site for the complete list. Here are a few I’ve pulled for you to peruse at once (over a bold Cab, perhaps):
Mia’s Harvest Blog
Anne Amie Vineyards
Many of us may be familiar with Stormhoek via High MacLeod’s gallant efforts on their behalf.
It’s nice to see others join the fray, especially since wine is a product rich with story.