The Facebook News Feed, to me, is one of their most impressive innovations. Among many things it encourages viral swarming of friends to given activities, applications and groups. I wish more applications provided one.
The goal of Particls: To provide an interface into which the status changes of your friends co-exist with the news headlines you care about in a unified, ranked and filtered river of news.
All we need now is an RSS feed of your Facebook News Feed.