I went to Chicago Ruby Hackfest tonight. We experimented with IronMQ and IronWorker. These products are cloud hosted compute grid/message queue products. I was able to build a Heroku app that listened for messages that I sent from a Ruby console in a matter of minutes. Here’s the code for the Heroku listener. Obviously, polling for messages is a pretty crude approach, an event based approach would be better. Unfortunately, if you want some sort of notification based approach you’ll have to roll your own.