If I understand your idea correctly, a side-effect would be that it would be harder to go back and comment on articles you have already read. So if everyone di

If I understand your idea correctly, a side-effect would be that it would be harder to go back and comment on articles you have already read. So if everyone did this, the amount of discussion for each post would decrease. I'd be happy with a less drastic measure: Why store the previously read info in a cookie? Perhaps it could be stored with my account instead. This way the highlighting of previously-read articles would be consistent regardless of which PC I happened to be using. The number of articles stored could be limited to a reasonable number (say 3x length of the # of items on the front page).