Please add filter for e-mail body, $subject and headers

Hi,
Great plugin! We used the plugin in a project with a custom registration page. We wanted to use this form/registration page instead of the default wordpresss registration form. Unfortunately there’re no filters to manipulate the e-mail content yet. Can you please add a filter before:

$send = wp_mail( $to, $subject, $body, $headers );
which enables developers to modify the e-mail body, header and subject? We also would like to add custom shortcodes for the client (i.e. name and last name of invited person) and the filter would enable us to replace custom shortcodes. Thank you!

We also noticed the new 1.0.6 version contains a folder “trunk” which seems to contain duplicates of the php files.

Kind regards,
InoPlugs