[PaulHoule]

I am always hearing from people who'd like to know when somebody replies to one of their comments. It seems like a notification system for Hacker News could be interesting in general. It's not particularly hard to write a script that follows new posts and comments but I'm not so sure how you pick up edits other than just running slow enough that you fetch stuff after the edit window has expired.

[ra7]

You can use https://www.hnreplies.com to get notified when someone replies to your comments.

[jimmySixDOF]

God bless Dan Grossman keeping this open and running wherever he is: hnreplies.com