What the heck are RSS feed readers??

Ok, I'll be the first to admit I had no clue what this was...yeah I've seen the little icon on some sites but never really paid attention or tried to learn what it was until this Web 2.0 stuff came along at work and activity #11 is about just that. So....I looked into it and interestingly enough I already had Google Reader and just never looked at it. What I found is that Google has their own blog...too funny! I added the news feed from ABC news on my google reader and it will give me the headlines right on my google page which I think is pretty cool stuff.