First, I want to say that this plugin is awesome. Really great work guys. Trying to squeeze some money out of the bosses to donate to plugins like this that make our lives easier. You are at the top of the list.
That said, I do have a problem with the plugin. The meta box type 'wysiwyg' seems to be broken.
$filter_args = array( 'addresss' => array( 'name' => 'Physical Address', 'meta' => '_address', 'metabox' => 'my_box', 'type' => 'wysiwyg' ), ...
This creates a textarea without the editor.