SharePoint 2013 RSS feed Configuration

http://social.msdn.microsoft.com/Forums/sharepoint/en-US/5c51198e-a682-4817-b098-78b8b302e1aa/rss-viewer-in-sharepoint-2013
http://www.dummies.com/how-to/content/view-rss-feeds-in-sharepoint.html

http://jaredmatfess.wordpress.com/2013/04/23/sharepoint-february-2013-cu-cod-breaks-the-rss-viewer-webpart/
http://blogs.msdn.com/b/adamhems/archive/2006/06/13/629761.aspx