In this old video, Laura Rogers demonstrates how to display a RSS feed in a data view web part. This is done in SharePoint 2007, using SharePoint Designer 2007.

FireArrow Advanced RSS Viewer web part provides a simple, efficient and elegant solution to aggregate and display RSS feeds from various sources in a SharePoint site. It enables you to group and display feed contents in SharePoint with multiple styles, auto-play feature with cool transition effects, and more configurable controls. With its auto-refresh feature and caching capability, you can always get the latest information in an efficient way. It supports both SharePoint 2007 and 2010.