The Open Media Streaming Project has added CC metadata support to their streaming audio server and player.
OMSP’s NeMeSi player displaying license info for a stream.
They say:
Posted 30 June 2004Please note that the CC stuff in the source code is in very alpha stage: no more than IETF’s-style “running code” to test a soon-to-be-released specification proposal for streaming Creative Commons licensing meta-data over RTSP/RTP protocols.