Comment notifications via e-mail

I would like to have a module for Drupal 6 that can send comment notifications via e-mail to people that previously left a comment on my site. I don't want to use the subscriptions module for I don't need a bulky subscriptions framework. I want a light-weight and simple alternative such as the notify module but apparently it is no longer being maintained. A module like notify module would make a good candidate for inclusion into Drupal core so let's port it to Drupal 6, and work on getting it into Drupal 7. Takers?