On my Multi-site install I generally map the subblog to the domain at the same time I change the nameservers for the domain, this gives me zero downtime during the DNS propagation.
However I've just noticed that the current version of the domain mapping plugin has a warning that wont let me map the domain if it doesnt pass health check.
This results in me needing to hover over this panel waiting for propagation to come through so I can set this and not have any visitors get my 'greetings site admin, we are currently allowing no registrations' message...
Currently I have a client site I just completed and the client gave me the 'OK' to launch, I've changed the nameservers over and from my cellphone the new dns loads sending me to my parent blog and on my desktop when trying to map the domain it hasn't propagated there yet so I can't map it.
The whole 'no mapping until dns is propagated' is very unhelpful in my situation. I'd like to set the domain mapping on the subblog before initiating the dns propagation so I have no downtime on the clients live domain switching from their old site to their new site.
I understand that domain mapping before the dns propagates makes the subblog inaccessable when accessed by the domain (because it hasn't propagated yet) but the clients live site is more important..
Anyway, I gutted the plugin so this could happen, I would like to see an 'override' or something in future releases to fix this.