MythNews
From MythTV Official Wiki
MythNews is a module which permits the user to follow their favorite news sources, available in RSS (Really Simple Syndication) format. The Ubuntu website has some more information about using MythNews.
Custom Newsfeeds
URLs to syndication links are stored in
/usr/share/mythtv/mythnews/news-sites.xml
Edit them with a simple texteditor and superuser rights.
Troubleshooting: Read-Only Filesystems
MyhthNews will store it's downloaded newsfeeds in
/home/mythtv/.mythtv/MythNews
Make sure it exists and set the permissions to the myth user and group.
Importing feeds from Google Reader
A MythTV user has written a couple of scripts to import subscriptions exported from Google Reader. They're available from MythNewsGoogleReader.