I have not tried to do this with more than one computer, so I don't know how well it will scale, but I have run the command cat /dev/video0 >~/public_html/tv.mpg to save a stream from my pvr150 to a location readable by apache. On my laptop I could then stream the video by telling issuing the command xine http://serverip/~username/tv.mpg.
Another thought that I had is if the network does not support multicast, could you configure vlc to stream to the broadcast address of the network and have all of the computers listen for the incoming stream?
