The notify module allows users to subscribe to periodic emails which include all new or revised content and/or comments much like the daily news letters sent by some websites.
Even if this feature is not configured for normal site users, it can be a useful feature for an administrator of a site to receive notification of new content submissions and comment posts.
Support Status and Similar Modules
This module provides similar functionality to other contributed modules. There is a comparison of the comment notification modules on groups.drupal.org which may be helpful in deciding which one is right for you.
You are encouraged to also try notifications.module, as well as trigger and action modules which is part of Drupal 6 core, as possible alternatives. These are extensible frameworks and are likely to see more rapid development.
There is a significant backlog of support requests, and it will be dependent upon the community for these to be answered, as bug fixes and improvements will be prioritized. Those who help out by answering & closing support requests and supplying patches will be more likely to have their feature requests answered. However, the primary goal of notify module will be to remain a light-weight and simple alternative to Subscriptions/Notifications, which requires no configuration, so not all feature requests will be implemented, even if they are a good idea. If you need more configurability, you should consider one of these solutions.
Current maintainer can be hired for customizations and other Drupal services.