3:01 PM
Though there are some who disdain it as "Newsfilter", here's an example of exactly why I visit Metafilter six to eight times a day:

A MeFi user links to the story of western journalists being ejected from Iraq. Within two hours the related MeFi comments thread has pointed to a great story on Iraq's attempts to manipulate foreign journalists, CNN's story on the ejection, the story that got CNN in trouble in the first place.

Bonus points for the CNN employee who shows up in the thread to comment and pass along Iraqi denials that any of the above is actually occuring.