He who controls the feeds - controls INFORMATION.
This has nothing to do with Smart Documents, but I just wanted to mention Sig Weber's XSLT files that enable you to easily show RSS feeds as web parts on a Sharepoint site, without even having to install anything.
You simply add a built-in XML Web Part, point it at the RSS feed, and add one of the three XSLT files as the XSL source (each is a different display style).
Simple, easy and fun for the entire family.
http://playground.doesntexist.org/