Ansible for CD

I'm working on putting down a DTAP environment, but i want to skip the classic DTAP where there is a lot of manual work and time gained in a scrum process is wasted in the waterfall way of working.

So i need some automation there. Automating means that i want users to be able to go to a website, select (or create) an environment and install the software that should be tested.

I had a look at Puppet and set up a test between two VBox instances. Is working with not too much work, but i don't like it. Seems a bit of a steep learning curve.
Then someone pointed out Ansible and i started to watch the video from last PyConn: http://www.ansible.com/resources. I'm already convinced this is the tool i need. And i'm happy to set up a prototype implementation!