I find this oddly terrifying, but sample chapters of my book Content Syndication with RSS are appearing all over the web. Support your local syndicator by visiting Syndic8, who have Chapters 2 and 4 for download and Newsgator who has Chapter 2 for online perusal.
O'Reilly is publishing Ben Hammersley's new book Content Syndication with RSS. A couple of chapters are available for viewing at the sites listed above. Ben's site is a good source of information on issues regarding RSS and how people are using it to share information.