Hi everyone, we've listened to everyone's feedback and worked hard to implement a highly requested feature: Publish Controls. With this new feature, you'll be able to publish and unpublish domains of your choosing.
Check out our blog post for more information: http://blog.webflow.com/publish-targets-and-domain-redirect
A picture is worth a thousand words:
Along with this new release, you'll also be able to specify a "default" domain. This eliminates duplicate content on search engines, and provides users with a consistent experience: