YC Tracker does this for single pages: http://www.selfdebugging.com/2007/10/09/yc-news-tracker-a-better-way-to-read-comments/ http://www.selfdebugging.com/2007

YC Tracker does this for single pages: http://www.selfdebugging.com/2007/10/09/yc-news-tracker-a-better-way-to-read-comments/ http://www.selfdebugging.com/2007/10/09/yc-news-tracker-a-be... However you have to remember to run the script first time you see the page to be able to compare later. This kills it for me most of the time.