Regarding client-server communication, are you using an existing library (socket.io, sockjs, etc) for the client->server communication, did you roll your own, or is this an "exercise left to the reader"?
Communication happens over HTTP at the wire level, and we use the Server Sent Events standard (http://en.wikipedia.org/wiki/Server-sent_events), and particularly browsers' EventSource implementations as the foundation on the client side.
Pedestal Services have a balled up implementation that transmits the data from the server side.
Pedestal Services have a balled up implementation that transmits the data from the server side.