You can easily add new content to your site using rss. The news will only update as often as the "donor" site updates it, but new content daily seams reasonable. The main problem with simply using another sites feeds is they typicaly only allow you to display a short snippet of the news article, then the user needs to click on a link to visit the donor site to read the remainder of the story.
There are however services that allow you to have the entire article on your site. These services are generaly paid services, and can be fairly pricey.
As for actualy using rss. What you need to do is install an rss parser on your site. I can't really go into much detail here because parsers vary greatly depending on the type of information you want to use.
Fow a parser you might want to look around on hotscripts.com
Mack.
