To use the viewer as you see it, use this URL in your server-side include:
http://www.dba-oracle.com/oracle_news/rssview.php?ctl=0
For an iframe, just add the following to your page:
<iframe width="320" height="750" src="http://www.dba-oracle.com/oracle_news/rssview.php?ctl=0&fullhtml=1">
The syntax of server-side includes will depend on the language in use on your
webserver.