The good news is - there will be a conference dedicated to these topics:
The conference will take two days on Nov 7 and 8 in Portland, OR. I'm delighted to announce that I'll be giving a talk there. I'll speak about our view on messaging in the web environment, our attempt (and failure) to build a generic web-messaging service, and finally I'll describe what we came up after all this - the SockJS project. (Which is a simple WebSocket emulation layer, but it took us a while to understand why this is the best approach to do web-messaging.) I'll be hanging around there for the two days - feel free to talk to me about SockJS, RabbitMQ, AMQP or just messaging in general in any flavour. See you in Portland!