Apple's AirPlay technology/branding (September 1, 2010) seems to fit the bill. One can stream audio/visual streams, for example YouTube/NetFlix/etc to iPhone/iPad to AppleTV. Unfortunately I have been unable to find a document detailing everything, but I have identified some Apple patents that may apply:
GESTURE VISUALIZATION AND SHARING BETWEEN ELECTRONIC ...
VLC media player has had this functionality for many, many years (very handy to do multi-room audio at parties for no cost!). See (dated 2005):
The page linked above demonstrates all of the three required criteria for prior art but does takes some reading to fathom. The first page I found that walks you ...
Does this count:
It mentions a mesh network between separate Sonos devices.
The date published mentions 05/13/2004, but the document has been updated in 01/07/2013.
The picture of the mesh network:
is dated as modified on 17 July ...
This looks like it was preceded by http://www.google.com/patents/WO2006133764A8 "A method for establishing a paired connection between media devices"
A method for establishing a paired connection between first and second media devices >across a network includes transmitting
a first information message across the network including an ...