Although destroywhiteboy.com has been registered, it is not using WordPress.com nameservers. If your domain is mapped to a self-hosted site, then your configuration may be fine as currently set up. If you wish to host your site at WordPress.com, you will need to update your nameservers as outlined below.
WordPress.com does not accept incoming domain transfers. You can however map an existing domain.
Important Notes Before Upgrading http://en.support.wordpress.com/domains/#important-notes-before-upgrading
In order to map to a domain one must have an underlying .wordpress.com subdomain blog to map from. If you have registered a .wordpress.com blog you log in as Admin under the exact same username account that registered the blog and purchase a domain name by purchasing an annually renewable domain mapping upgrade for the blog.
See here for mapping an existing domain that you already own http://en.support.wordpress.com/domains/map-existing-domain/
Dashboard > Store > My Upgrades is where you do the primary blog set up knowing it can take between 24 - 72 hours for domain name propagation to take place throughout the internet. You can view the DNS changes here > http://www.whatsmydns.net/ What's important during that stage is to be patient.