I would be interested to see a detailed comparison of the above and SQS which I've used to great success with the python library boto (<a href="http://code.google.com/p/boto/" rel="nofollow">http://code.google.com/p/boto/</a>). And yes, I googled and haven't found anything good :)<p>I haven't used ActiveMQ before due to no reason other than horror stories from basically everyone I know who has used it heavily.<p>RabbitMQ seems like an interesting solution to explore if I ever need more speed than SQS provides.