I love RSS feeds! I have been using Google Reader for well over a year now to keep up with all of the blogs that I follow, and it is far easier than taking the time to check each blog individually. Although you can't see the blog's design features, all of the posted text and pictures show up on the reader. If you want to visit the actual blog all you have to do is click on the blog or post title. Google Reader will even recommend blogs to you based on the current blogs that you subscribe to. Some of my favorite blogs have come from Google Reader's recommendations.
I think there are multiple uses for RSS feeds in the school. A teacher could create a Reader account for his/her classroom and subscribe to blogs or websites that connect to what the students are studying. Depending on the age of the students, the teacher could preview content and then allow students to explore it or the teacher could use it as a way to stay personally informed during the unit of study. A librarian could create a Reader account for the teachers and feature PD blogs or education sites for them to read. The possibilities are endless as RSS feeds provide an easy way for current information to be assimilated for fantastic learning experiences.