I have been creating these like crazy recently but I wanted to share with the community another SONOS plugin I have built. Sky.FM has tons of great radio channels, all free, and now all on your SONOS!
To get it all set up you can follow my step-by-step instructions for my Souncloud pluginfor SONOS and simply use the following info.
Endpoint and Secure Endpoint URL: http://inburst.io/sonos/skyfm/SonosAPI.php
Authentication SOAP header policy: Anonymous
Container Type: Music Service