RadioRec is a project to create a graphical media center alike interface to netradio dumping using slightly modified xmltv. It is written in java, but uses python for grabbers.
MPlayer is used for dumping the streams
NetDJ is basically a netradio or an MP3 IceCast-streamer. The difference between other projects is that is a communitity-based solution. The idea is that NetDJ is used in f.x. an office environment: Everybody listen, add, and skip songs in NetDJ