We’ve been using a lot of the EC2 modules in some internal things though we’ve been wanting to get more integration tests in the project.
You can see the start of some playbooks to test EC2 things live here:
https://github.com/ansible/ansible/blob/devel/test/integration/amazon.yml
(These will require a credentials.yml file and will fail if they are not defined. More info/README details coming soon, and obviously more module tests)
I can see this idea being easily extensible to add integration tests for Rackspace, as well as things like Digital Ocean and other providers.
Hope folks find this useful – I’m really happy to see playbooks be the language for this, as it makes it easy to contribute and expand.