I never knew that anyone was publishing books via RSS in a serial format... But apparently, they are, and have been for some time. A brief history of this novel (excuse the pun) serialization technique can be found at Names@Work. (This site is a plug for post is about the book Pulse: The Coming of Age of Systems and Machines Inspired by Living Things, which is being published via RSS and email in serial format at this site.)

[28 October 2006: As noted by Antony in the comment below, I mischaracterized his site in my original post. I've edited the text to clear up my misconception.]

Amanda Etches-Johnson at Blog Without a Library started a Blogging Libraries Wiki. It's a compendium of library blogs (public-facing blogs by public, academic, special, and school libraries, public-facing blogs by library associations, and blogs for internal communications). If your library blog's not listed, add it!