NetStreamer is Internet Radio at its finest (=. There is a server, a transmitter, and a reciever -- all following the radio station analogy.
The Server listens for receivers and also sends out the transmitters data. the transmitter(s) take audio from stdin, /dev/{audio,dsp}, or .tape files and sends them to the Server where the reciever steps in. the receiver listens on a server and can tune into any transmitter on that server. This is like Shoutcast, but with infinitely more ability. Plug a radio into the PC input jack and you can broadcast over the Internet. or cd audio, or your mp3 collection. Whatever. Even do a real Radio broadcast with a mic. The software is currently in a state of not compiling. Will get this fixed soon. hope to have a package up in a week or so. will see. BTW it is all GPL and there is even a Windows client. Making other clients should not be difficult, all the source is here.