Hotel Duques de Nájera
A great place to stay while visiting Rioja wine country, and it's on the Camino de Santiago.

La Rioja Alta
A very complete Web site from one of Spain's quality producers. Though it's a commercial site, there's loads of detailed information about the Rioja region, winemaking, grape varieties, and more.

Lavinia
Based in Madrid, one of the country's best wine & spirits shops, also a top class restaurant. Not to be missed.

Miguel Torres
One of Spain's leading producers, the Miguel Torres winery produces a wide range of quality Penedés wines, available just about everywhere.

Reference & Guides
Terminology, labels, bibliography, winery tours, vintage tables and more.

Robin Garr's notes
Wine writer Robin Garr's comments and tasting notes on recently sampled Spanish wines. Interesting commentary and a good place to track down the names (and characteristics) of the Spanish wines available in the US.

Spanish Wine Lover
One of the best online offerings about wines from Spain: articles, tasting notes.. and more. In both English & Spanish. Terrific site.

Vila Viniteca
A terrific wine shop, based in Barcelona, one of the best in Spain. Great selection: wine, spirits, gourmet fare.