Chorizo is a sausage that has many different varieties and is eaten all over Spain. Most chorizo that you would buy in stores has been cured, but fresh chorizo, which is softer is also available. Chorizo is made by chopping or grinding the pork and marinating it in spices. Spanish paprika (sweet or spicey) is the spice which is gives chorizo its characteristic flavor and distinguishes it from other sausages. The casing of the chorizo is usually made from pork, if made at home.
Chorizo may be sliced and eaten alone or with crusty French-style bread or can be fried. It is very common to use it as an ingredient in other dishes, such as stews and soups.
Here in the USA, many people are familiar with the Mexican or Caribbean chorizo, both of which are very different from the Spanish sausage in both taste and appearance.
La Matanza - During the late fall and winter, many families travel from the big cities to the towns from which they originate and get together for the matanza or slaughter of the pigs. If they havent raised pigs themselves, they will buy a pig from a local farmer and slaughter it. The whole family usually gets into the act from the young children to the grandparents. They spend the weekend butchering, cooking, and stuffing sausages, with the women doing most of the work in the kitchen in huge vats or tubs because a grown pig can weight hundreds of pound and produces lots of meat! Its not all work and no play. The bota, (sheepskin bag for carrying wine) or porrón (glass wine carafe with long spout) is passed around. The neighbors and extended family gather to taste the latest vintage from uncle Josés cellar or grandpas aged batch of herb liquor. Once the chorizo has been stuffed into casings, the family usually divides up the sausage and it is hung to dry and cure.
Details about chorizo and the many varieties:

