I have just uploaded the Railo WebSockets Gateway Extension to the Railo preview extension provider.
This extension enables you to launch a server that is capable to manage messaging from HTML WebSockets.
The server runs on a dedicated port. Railo will receive notifications when a connection is opened, closed and any time a message is sent invoking a cfc listener class. The gateway can also being invoked via SendGatewayMessage so to allow your app to push message to all the connected clients.
You can find docs about the extension in the Railo wiki and some sample code cloning the following github repo https://github.com/andreacfm/websockets_example_apps.
Please post any feedback in the Railo Google Group and any bug in the Railo Jira bugtraker.