I've written an indicator for the Unity panel to keep at hand the radio and tv streams I'm interested in, I've tested it in raring and it's works well. If you want to try it out you can download the zip archive here. You just have to make the indicator-pyradio.py file executable and launch it. It relies on vlc for the playback and gedit for the editing of the streams "database" so you'll need this two programs. Let me know what you think about it!