Comment Annotated (Score 1) 393
I think that instead of a list box at the bottom of the page, you have a slider on the side of the page that annotates the article with that users comments. That way specific arguments/comments can be made right in context with the article. Also this will allow for easier detection/elimination of spam because it won't annotate correctly (at least at first).
This would make reading the comments easier because they are in the context of article and reduce the amount of quoting of the original article.