CNN is saying they will scan the site for news they find important and relevant and those articles may show up on the main CNN.com site.
I think it's commendable for a traditional news organization to do this. Although considering how CNN started, they may not like to be called traditional. But they're big, and powerful and from most people's viewpoint, they are a traditional news organization. It seems that CNN is embracing community driven news without worrying too much that it may someday eclipse the