WinAmp radio, Windows Media Services, etc. Pick the one you feel is easiest and work from there. If I and my players all own a copy of a soundtrack album and want to use it in a game then I feel it is uncool to be unable to do so using the SoundCloud service. I know "you can do it at your own risk" but that's exactly it - whereas WinAmp radio or some other service would allow me to host my own streaming service and use it in my games.