Feature Request: Domain Mapping

Would it be possible to add a check box to the user's domain mapping screen?

As it is right now, if a user places a domain into the domain mapping screen, their network URL automatically redirects to the domain they added.

This is a problem if the domain takes a while to propagate, as nobody will be able to view their site.

If there was a check box that could be checked once their domain was pointing to the site correctly, then the system could automatically redirect to the domain, but if unchecked the network URL will be used.