HN Unread Comments is an extension for Google Chrome. This extension will keep track of comments you read on Hacker News and then show you which ones are new. It works on the "threads" page and on a individual item.
What's new in version 1.1
ReleaseJanuary 21, 2011
Date AddedNovember 27, 2010
Operating SystemsWindows 2003, Windows 2000, Windows Vista, Windows, Windows 7, Windows XP