This was mentioned by Mark Jaquith at WordCamp San Francisco as to how to minimize the wait time (and risks) that comes with changing the DNS info for a website. Really quite simple when you think about it.
How to make DNS changes with minimal downtime.
(For those who aren’t familiar with DNS, it’s basically the phone book that says when you want to reach this website, use this number. Switching the numbers can take up to 48 hours to propagate across the web and cause problems during the transition.)
