Does Newsvine support this? I'm not a Newsvine user (I waste more than enough time reading Startup News!), but I think that Newsvine allows you to set up a personal feed, so that people who think you're a good editor can follow your feed.

Not sure about how you might go about setting up a small-group feed a la BoingBoing, where you and your twenty cronies collaborate to edit the news.