Fark.com
Fark is what's known as a news aggregator. The page is divided into several tabs, "Not News", "Sports", "Business", "Geek", "Showbiz", "Politics", "Music", and "Video" Users submit stories that are relevant to each tab, and staffers and subscribers decide which ones are posted. Once a story is posted, a corresponding forum thread is created where any subscriber can comment on the story.