Nice to see another Flash RSS Viewer come along, this time with the source all available. It looks like a nice job done by the people at Erational.org.
The RSS Viewer is released under the GPL Open Source license, and the PHP source files, as well as the FLA is available for download from the site.
They have also made a Flash RSS banner, which looks pretty nifty.
Check out the info page at Erational.org for more information about the rssViewer, on the info page you will also find the rssBanner.
The only improvement I could think of that they could do, would be to include my newsfeed ;-) As luck would have it, the rssViewer allows you to add your own favorite RSS feeds to the viewer.