"Airtime 2.0 has been released a few days ago and it includes
many improvements like easier Icecast and SHOUTcast streams
configuration, better calendar, playlists and SoundCloud
integratoin and more.
In Airtime 2.0, Icecast and SHOUTcast streams as well as the
hardware output API (ALSA, OSS, AO, Pulseaudio, and Portaudio) can
be configued through the web interface. Also, you can now have up
to three streams with different bitrates and point them to
different Icecast / SHOUTcast servers.