First step reimplementing PeerCast with web technology
Replacing already exists platform is difficult. The first step should be smaller.
Needing things for PeerCast is encoder, sender, receiver, player, and YellowPages(channel list).
Encoder etc is difficult to be compatible with legacy PeerCast. But, YellowPages is suitable to implement with web technology.
Reimplementing YellowPages is just right to try first.