RSS Benefits

I kept this article for my file on "things we should be doing but aren't doing." It's written by a law librarian and discusses how it would be helpful to her if more publishers used RSS feeds to inform her about new titles instead of using direct mail, email alerts, etc. For example, the article mentions that John Wiley has a RSS feed for new titles by subject. What I'm interested in finding out is how hard this is to get started.