This video streaming software is designed for 1 to many video
broadcasting. There is a special interface for broadcaster to send
video and see all channel viewers and their reactions and also a
special interface for viewers. They can see the video and chat
realtime about it.
http://www.videowhisper.com/?p=Live+Streaming

This is developed for all of you that want to build sites with
features like on justin tv, ustream tv, mogulus, stickam, blog tv or
their clones and just need the right plugin to provide this video
broadcasting functionality.

This software was designed for 1 to many video streaming so there are
3 different interfaces:
1. Live Broadcast (for publisher)
2. Live Video Watch (for active viewers, discuss online)
3. Live Video Streaming (for passive viewers, simple live video)