Do you think that libraries should be offering workshops on RSS technology aimed at patrons? faculty? students? librarians?
Yes, libraries should offer workshops on RSS technology because it is about filtering and retrieving relevant information. I believe those who will get the most out of it are librarians who will use the technology to develop "bibliographies" or reading lists for faulty, students, and patrons. RSS is just a new way to gather information. We are already seeing many of these "feed lists" at public, academic, and special library websites. As librarians learn to do mashups they can customize a feed for students, instructors and patrons based on their needs.
As more libraries move to web-based catalogs with built-in RSS feed support, users will be able to create their own RSS feeds. Librarians can promote the use of RSS feeds on their websites and offer webinars and screencasts how to use them. Good RSS feed examples will help show what is in for the user. But I think initially many users will rely on librarians to create reading lists for them and deliver them via email. Contra Costa County Library has taken this approach at http://ccclib.org/checkitout/. Even though I am a heavy RSS user, I love their monthly newsletters.
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I agree with your point that many users will probably rely on the librarian to create reading lists for them. I see this with our staff. For I don't know how long, I've been trying to get them to create their own "Keeper's List" from OPAC when they want books pulled for a topic they are covering. In part, I think it's their comfort level with computers. Many of them only use it for MS Word, to access their email, and to go to specific websites. As information professionals, it is also part of our duty to help our patrons along into the digital world. Teaching them about RSS technology is certainly one of the places to start.