Hm. This is one of the rare times where a product actually does too much for me. If it gave me the ability to build and manage virtual envs for testing and development with ssh access (and maybe the ability to download them in say... vagrant box format) and nothing more, I would be sold immediately.
Creator of Vagrant here. Disclaimer that any of the comments I say following are my own opinion and do not reflect what the action.io team is thinking.
I'm very excited about the possibilities that action.io provides. Additionally, I think integration between the two would be the best of both worlds, providing a CLI based interface and possibly non-web based development through my virtualization providers (VirtualBox for now, many more coming soon), as well as web-based development should you want it using the fantastic tools that action.io is building.
We'll talk and see if we can come to a mutual agreement/vision. :)
Saw the initial tweet, but I did not see the discussion. Vagrant integration would be great, as I am traveling frequently and need my offline dev environment.
With the glossy IDE finish: not my thing :/.