Here are some links to get you started with RSS:
Create your own FREE account on this well known RSS aggregator
RSS Compendium: http://allrss.com/rssfeeds.html
You'll find at least a few things of interest to add to your Bloglines feeds here
Will Richardson's RSS quick start guide: http://weblogg-ed.com/wp-content/uploads/2006/05/RSSFAQ4.pdf
The best guide I've seen for getting started with RSS.
Will Richardon's RSS Wiki: http://webloggedlinks.pbwiki.com/RSS
Will has posted many RSS links on his handout wiki site.
RSS: The next killer app for education: http://technologysource.org/article/rss/
This article was published over 4 years ago, but it has a few nice examples on the relevance of RSS to education.
Using Bloglines: http://preetamrai.com/weblog/archives/2005/04/25/bloglines-how-to-keep-track-of-hundreds-of-blogs-and-some-news-and-some-podcasts-and-some-flickrs-photos-etc-etc/
An excellent tutorial from the betterdays blog by Preetam Rai of Singapore. Print this out and refer to it when you're getting started on Bloglines.
My Bloglines feeds: http://www.bloglines.com/public/jdornberg