Myth News is a module which permits the user to follow their favorite news sources, available in RSS (Really Simple Syndication) format.
The following URL helped me while dealing with read only filesystems (CD, NFS):
Basically it says at the end:
Had the same problem and it took me about three weeks to figure it out, but I guess this works.
Create a folder called MythNews in /home/mythtv/.mythtv/. Set the permissions to the myth user and group.
This should be it. MythNews will save the News in this folder from now on. Same should actually work for MythWeather.
This fixed my problems of not getting news when /home/mythtv/.mythtv/MythNews didn't exist on my bootable cdrom.