GeoRSS
- Provides details of how to add geographic data to RSS and Atom feeds using Geography Markup Language (GML) or the simplified GeoRSS standards.
- http://georss.org/

FeedTree
- Collaborative RSS and Atom delivery using using peer-to-peer multicast. Includes information for readers and publishers.
- http://www.feedtree.net/

Yahoo Pipes
- An interactive feed aggregator and manipulator. List of 'hot pipes' to subscribe to, and ability to create your own (yahoo account required).
- http://pipes.yahoo.com/

What is RSS/XML/Atom/Syndication?
- Introduction to syndication from the blog of Dave Shea.
- http://www.mezzoblue.com/archives/2004/05/19/what_is_rssx/

What is this RSS, XML, RDF, and Atom Business?
- Article from the eNewsletter Journal, including consideration of the likely impact on the online newsletter business.
- http://www.internetviz-newsletters.com/internetviz/e_article000224613.cfm

Wikipedia: Web Feed
- Encyclopedia article on the topic, including benfits, technical definition, and basic information on how to read feeds.
- http://en.wikipedia.org/wiki/Web_feed