This is the kind of thing that MBONE (Multicast Backbone) [1] was created to handle. Unfortunately, due to security concerns over multicast IP and no dedicated

This is the kind of thing that MBONE (Multicast Backbone) [1] was created to handle. Unfortunately, due to security concerns over multicast IP and no dedicated support for multiple parties, it died shortly after being birthed. [1] http://en.wikipedia.org/wiki/Mbone http://en.wikipedia.org/wiki/Mbone