If you’re using Windows SharePoint Services (WSS) 3.0, you might wish you could add RSS feeds to your sites like you can using the RSS Web Part in Microsoft Office SharePoint Server (MOSS). You can!
Simply add an XML Web Part to the site and paste the link to the RSS feed into the XML Link field on the configuration panel. It won’t be as “smart” as the RSS Web Part with respect to caching, etc., but it will work.
Depending on the RSS feed that you’re displaying, you may want to make some changes to the XSL that displays the content. You can also do this on the configuration panel, but the text editor there leaves a bit to be desired, so it may be easier for you if you copy out the XSL and edit it in SharePoint Designer.
You can also use the XML Web Part to display the contents of lists elsewhere in your Site Collection by pasting the link to that library or list’s RSS feed into the XML Link field. (Trim off the server name and make it a relative link.)