Why Rubyists Should Care About Messaging

I think that services/messaging will be the "next cool thing" for people doing Rails development.

There's only so much Ruby you can fit into a single process.

If you're afraid that not having ActiveRecord back your forms in the same Ruby process (and are using Rails 3), check out https://github.com/joevandyk/monkey_forms. It'll let you provide a simple layer between your forms and the backend storage mechanism (be it ActiveRecord, a RabbitMQ service, or whatever).