Camel, ActiveMQ, Dojo, JBoss7 & WebSocket Rolled Into One Real-Time Dashboard
This blogger's post doesn't just cover the technologies and architecture of the final product. It also looks at the other methods that could be used to create this live-updating dashboard.
The four options he presents are stateful/RESTful, polling-based, WebSockets and Comet. He's pretty critical of Comet though.
Finally he goes over why he used each of the technologies, such as Camel, ActiveMQ and WebSockets