Access control: add per-service granularity to media_internet permissions

I'd like to see access control for media_internet providers. Maybe something like hook_menu() has.

function hook_media_internet_providers() {
  return array(
    'youtube' => array(
      'title' => 'youtube',
      'image' => 'youtube.jpg',
      'access callback' => 'user_access', // Default values could be user_access
      'access arguments' => array('add media from remote sources'), // and add media from remote sources
    ),
  );
}