​Feature Request: Allow a sub-domain to point to Flex templates during transition from Zen

We're in the middle of our transition from Zen to Flex and my biggest complaint is that there is no publicly viewable way for people without a BLOX admin account to preview the new site. The login requirement also makes it harder for us to test it on a multitude of devices.

Now obviously this won't help us since we'll be done with the transition before it could be implemented, but I think a really cool and helpful feature would be the ability to point a sub-domain at the Flex URL map before the switchover, and NOT require an admin login.

For example: http://beta.galvnews.com

Now obviously I can redirect a URL to the appropriate preview URL right now, and have already done so. But the login requiernment prevents us from sharing the preview of the new site with a reader advisory panel or colleagues at a sister paper, etc.

What do y'all think?