I have a new client that I am converting over to Drupal from Wordpress. We have two domains with the same name but different TLDs i.e. .com & .org. We have decided to start by setting up the site first under the .com so we have a live site to play with during the development. So we currently have a wordpress site running on the .org and drupal (on a new host) running on the .com domain.

Is there a way to configure Drupal to work for both the .com and the .org version of the domain ?
I want to be able to just point the old domain, the .org, to the new host and have everything function.