I've used RSS a little but not enough to know much about it. For this Thing I subscribed to 5 library related blogs... two from our Library2Play group, two from well-known Texas librarians who create a lot of book trailers for YA, and Kathy Schrock's Kaffeklatsch. Then, since my interests include a little play from time to time, I had to include one for my machine embroidery hobby.
What I like most about RSS and readers is the basic idea. You don't have to go to each blog to see new posts. They are all in one place in the reader. And then, you don't have to read through all the posts to see what's new. Very helpful idea.
I will use this at school for following new YA books and promoting them with our students. It will also be a great way to keep up with some of the more innovative things the experts have to say about Web 2.0. Teachers and administrators can use RSS in the same way by choosing their own area of interest, locating relevant blogs, and subscribing. Easy!