Whenever someone registers a new domain, there is an excitement about when that site can be viewable by the world at large. In the past, knowing which DNS severs have propagated your new domain was nearly impossible to do. And, if you work for a web hosting company, you are also well experienced with angry customers complaining about why the domain they just registered 8 minutes ago is throwing browser errors.
However, progress has been made. I stumbled upon this amazing site which solves the mystery of which DNS servers have (and have not) propagated your domain name: http://www.whatsmydns.net/
To use it, simply type the name of your domain in the text box, and click search. You can also check the status of the NS records, MX records, and other advanced, but useful information. You will be amazed. That, I can promise you!