Checkout http://www.chicagoboss.org/about.htm
Written in Erlang
I have yet to see frameworks offer routing coming in from the websocket connection itself because it also requires non-standard javascript to send the route requests through a parent websocket connection.
Which is why I was thinking that it's the way this framework was designed.
From a previous post from someone else on HN, I began reading about N20, which is focused on Websockets as its first class transport. I am reading the docs because this is one of its many interesting features.