title: RX vs messaging queues like rabbitmq or zeromq?
body: <p>I'm quite new to these high level concurrency paradigms, and I've started using the scala RX bindings. So I'm trying to understand how RX differs from messaging queues like RabbitMQ or ZeroMQ?</p>
  
  <p>They both appear to use the subscribe/publish paradigm. Somewhere I saw a tweet about RX being run atop RabbitMQ.</p>
  
  <p>Could someone explain the differences between RX and messaging queues? Why would I choose one over the other? Can one be substituted for the other, or are they mutually exclusive? In what areas do they overlap?</p>