What is a RSS Newsfeed you ask well a explination is here. You can download a RSS Newsfeed program here and you can search groups here.

Here are some of the feeds that I am currently signed up for, just copy the link into the RSS Newsreader:
http://au.news.yahoo.com/rss/top_stories.xml
http://rss.news.yahoo.com/rss/mostviewed
http://www.azom.com/rss.asp
http://www.azonano.com/rss.asp
http://rss.topix.net/rss/business/electronics.xml
http://www.rss-specifications.com/blog-feed.xml
http://mickpc.blogspot.com/atom.xml

Let me know if you come across any other good feeds!