Learn more about the evolution of inter-system communication from direct database access to message-queue based solutions. It's not a Holy Grail or Silver Bullet but might prevent people making mistakes already made by others on their behalf. The journey starts with a quick tour of things we used to do and progresses through time ... ending with an overview of an almost-in-production Net::ActiveMQ. No Aardvark were harmed in the making of this presentation.