Message Queues: state of the art
A client asked my about issues related to setting up SSL and ActiveMQ and my immediate response was that there should be no problem. Indeed, I found several posts (wiki.ndgf.org/display/ndgfwiki/Standalone+Apache+ActiveMQ+with+SSL+support),listing the steps needed to setup up such a system.
Afterwards in the process of researching, I found that there are new protocols (st least for me) named STOPM (stomp.codehaus.org/) and AMQP (Advanced Message Queue Protocol ) supported only by several vendors but are the standard these days.
In one of my previous posts I mentioned Lshift (www.lshift.net/blog/), the company that developed RabbitMQ, which was written in Erlang and is supposed to be an extremely fast MQ server.
An interesting post comparing many vendors (including RabbitMQ and ActiveMQ) and their respective supported protocols can be found here:
Others are welcomed to contribute based on their experience,