euh j´ai cru voir ca avec avalaunch et xbmp.
http://www.xboxmediaplayer.de
au sinon :
XNSCast is an experimental Shoutcast/Icecast stream relayer for use with XBMP. It works by presenting fake files to XBMP, and when these files are requested, a connection to a Shoutcast/Icecast- server is made, and data from the Shoutcast/Icecast stream is relayed to XBMP, imitating regular Relax behaviour. This means that you can finally Listen to Shoutcast radio using your Xbox!
http://www.xbox-scene.com/software/software.php?page=mediaplayers