I am using Ruby on Rails 3 and I am considering to implement messaging queues for my applications using the Advanced Message Queuing Protocol (AMQP).
So, relating to that arguments, I would like to know what hosting services can provide a RabbitMQ server (this is an open source implementation of AMQP).
I’d try something like Amazon EC2 or Rackspace Cloud, you have full control of the systems then.