try this:
- opensuse 11,
- icecast 2 server,
- darkice and darksnow,
all you can download in http://software.opensuses.org
to install icecast 2 just click in 1click install in the opensuse software search web.
to install darkice an darksnow just find in the opensuse web,
just make sure, you have liblame, libflac, libvorbis and any other library related to the mp3/mtp things installed.
and the results, you have the internet radio on your linux.
happy linux.