highlight the link i just came from briefly and fade the highlight out over a few seconds when i return to the page via back button (or use some approximating heuristic ) ... i like to scan the page multiple times a day and i cant rely on the native highlighting to see the comment link on what i just read because the top stories are re-ordered throughout the day. so i have to scan the page visually for the title of the story. I'm going to make this a browser plugin for myself if you don't do it, but I'd rather everyone have this feature natively....