I'm planning to switch near the end of the year and want to clear this up before them. Right now I have cdn. on my domain pointing to a CloudFront distribution using my current host's domain editor.
Do WordPress.com-hosted domains support this? If so, does it cost any extra? I can't find much on the management-side of domains here beyond setting up Google Apps for email.
Speaking of which, is there any cost associated with adding an MX record to handle email passed to Gmail?
The blog I need help with is digitalscofflaw.wordpress.com.