Hi Colin,
We've been testing union server for a couple of years as means to enhance our web service's collaborative experience.
However, we've consistently had issues with users losing their connection to union server and having to refresh their browsers, thereby losing the current state of their collaborative experience. This has prevented us from utilizing union with our commercial clients, thereby muting the need for us to purchase a license.
We would be happy to purchase a license if we could identify how to provide stability to users connection to union server and how we might implement a method that allows users to reestablish communication with the union server without having to refresh their browsers.
Thanks,
-Echologic