Some web sites with "live" data

http://www.feedzilla.com/rss.asp

http://www.dmoz.org/Computers/Internet/On_the_Web/Syndication_and_Feeds/RSS/

http://buzzlog.buzz.yahoo.com/overall/

http://www.google.com/trends/hottrends

http://www.npr.org/rss/index.html

http://www.weather.gov/rss/

http://www.dogpile.com/

http://digg.com/news

http://www.reddit.com/