For those who are unfamiliar with RSS, it is a kind of a news distribution format. Which means, RSSreader, can be used as a news reader. RSS stands for "Really Simple Syndication".

For articles and explanations of what RSS really is:

http://www.pcmag.com/article2/0,1759,1267205,00.asp
http://en.wikipedia.org/wiki/RSS_(protocol)
http://www.xml.com/pub/a/2002/12/18/dive-into-xml.html [Technical]

For some information about RSS feeds, many popular news websites provide RSS feeds that can be viewed in an RSS reader.

http://news.yahoo.com/rss
http://news.com.com/2009-1090-980549.html?tag=alias
http://www.washingtonpost.com/wp-adv/rss/front.htm