WordPress.com-registered domains

Check this out: http://en.support.wordpress.com/domain-mapping/domain-management/ It looks like you can just change the name servers/a records/whatever. But if your client is not planning on switching back to WordPress.com, I would suggest you transfer to another registrar. It looks like the Automattic domain manager is pretty full featured, however, so maybe that’s not necessary.

WordPress mu domain mapping

Essentially, no. If you look at how that plugin stores its mappings: mysql> desc wp_domain_mapping; +———+————–+——+—–+———+—————-+ | Field | Type | Null | Key | Default | Extra | +———+————–+——+—–+———+—————-+ | id | bigint(20) | NO | PRI | NULL | auto_increment | | blog_id | bigint(20) | NO | MUL | NULL | | … Read more