As you've seen before, there are many feeds that aren’t publicized in WordPress. You can use a query string format similar to the one you used for searches to get feeds of your custom content types. The post_type parameter given should match the name of your custom content type. … [Read more...] about Feeds for custom content types in WordPress 3.0
feeds
Hidden feeds: categories, tags, authors, search terms, links
WordPress generates a number of other feeds in addition to those for posts and comments. There's a feed for each of your categories and tags. You can also get feeds of posts written by an individual author. You can even get feeds for search results! Since WordPress doesn't … [Read more...] about Hidden feeds: categories, tags, authors, search terms, links