This screencast shows how to set up Rules to allow comment writers to be notified when replies are posted to their comments.

It covers:

• Adding a checkbox to the comment form, turning on or off reply notifications
• Sending e-mails to the comment author when new comments are posted
• Not sending e-mails when replying to own comments
• Some words about checking "entity has field" on the correct entity

By Johan Falk; Usage Attribution-Noncommercial-Share Alike 3.0