It’s here: you can now use your own custom domain with your WordPress.com blog. For example, if your blog was currently at example.wordpress.com you could buy example.com from us and we would automatically move your blog over and redirect all your links and readers to the new domain.
How does this work? Well to get started go to Options > Domains. You can enter the domain you want in the box at the top.
If the domain isn’t registered, it will ask you for some information and then register it for you, and add domain mapping, for $15/yr.
If you already own a domain you registered somewhere else, you can map it for $10/yr. The next screen will tell you how to change the DNS nameservers on your domain to point to WordPress, and once you do that your domain should be live within a few hours.
This is pretty new, and somewhat technical functionality. If you have any questions at all don’t hesitate to contact support using the feedback tab at the top-right of your dashboard, and one of the team will get back to you immediately. Congrats to Andy for his great work on this oft-requested feature.