What differentiates this from every other chat app that gets posted here? Using erlang for a chat app doesn't seem all that newsworthy to me.
Is just a PoC of using RabbitMQ to route messages and keep history on a custom exchange. Messages are sent via Websockets. Nothing fancy. This is not competing against anyone :)
Please make the requirement detections upfront. Being tell that you browser doesn't suit after nick/gravatar is poor design.
Cool idea, nice to show off the possibilities of RabbitMQ