Out of the box, WordPress generates a number of RSS feeds for you automatically. These include feeds for comments, posts, and believe it or not, categories. I had previously thought that a plugin was required in order to turn categories into RSS feeds but that is not the case. Check this out.
WordPress supports a number of different syndication specifications, those of which are listed below along side their respected WordPress generated URL.
RSS Spec / WordPress URL
Comments RSS Feed / http://yourdomain.com/?feed=rss&p=50 where p stands for post and 50 is the post id.
Now here is the feed link which I found interesting.
Category RSS Feed / http://www.yourdomain.com/wp-rss2.php?cat=50 where cat stands for category and 50 is the category ID.
Finding the ID number for a category is easy if the blog your browsing is not using pretty permalinks. However, if the blog IS using permalinks, you can type in the following URLs to access their RSS Subscription Links.
http://www.domain.com/feed – Main RSS Feed
http://www.domain.com/comments/feed – Comments RSS Feed
http://www.domain.com/category/category-name/feed – RSS Feed For That Category
Why would you want to know this information? Now, if you come across a site that publishes articles within only a category or two of interest, you can subscribe directly to those categories instead of the entire blog making your RSS reader that much more efficient. For instance, I occasionally publish jokes or perhaps something out of my personal life when all you really care about, are reviews or news.