Check out this websight for a simple working implementation of the technology behind the beyond TV project
http://groups.yahoo.com/group/audvidsyn/messages/1?expand=1
For a look at functioning mainstream "streaming internet TV" check out this application
http://www.ahusoft.com/
Streaming tecnolagy has improved anuf so that at leat it dose work nowadays though you still have the probelm of the cost of bandwith on the central server. Intrestingly the is a P2P implemtation of treditional streaming:
http://adultinternet.tv/
This is a free to air porn channal (viers beware)
For info on the tecnolagy they use check out this sight
http://www.abacast.com/