I've done a bit of research and have found numerous threads on this topic: Using JRemote to link and unlink zones. There didn't seem to be any feedback from JRiver on this. Is JRiver interested in this feature? It seems like one of the few things that are considered a "state of the art" feature in multi-zone playback that JRiver doesn't have.
I think most people expect the Sonos model of being able to click zones on and off to play the same thing in different zones at the same time. Since zone link is already a feature, it seems like this might not require all that much effort to implement. I don't know of course; I'm just speculating.
I've kludged together a way of playing to all zones from Remote, but it's super ugly.
How many of you guys (and girls) are wanting this feature?
Brian.