+1. I also recommend Hacked Hacker News [1] for unread comment counts on the homepage, highlighting unread comments and inline commenting/editing. I also use Hacker News Collapse [2] to make comment threads collapsible.

My favorite is Hacker News Enhancement Suite [1], for unread comment counts, voting on front page, highlight unread, inline comment, collapsible thread, etc.

1: https://chrome.google.com/webstore/detail/hacker-news-enhanc...

etcet

It has color coded upvote counts too! http://i.imgur.com/6NQyhPI.png

I take pull requests at https://github.com/etcet/HNES but I only have a few hours a week to work on it.