I checked this out a while ago but found it only works (out of the box) on EC2. Eagerly awaiting support for other environments.
Indeed. If they can add Openstack support I'd personally be more interested in it than Flynn, as Opdemand actually has a history...
To be clear you can use Openstack today, you just can't automatically provision Openstack instances. You have to construct your formation manually. However, you still get most of the platform benefits. :)