PhpList Subber

This plugin imports forms from you PhpList host into wordpress.
Your subscription forms can be used anywhere in wordpress using shortcodes.
Custom user attributes defined in phplist are also taken into account.
The plugin uses async calls (ajax) for registrations. You can fully customize the respone on success or failures.

NOTE: This plugin will only work with self hosted PhpList environments. It does not work with phplist.com accounts.