Fark.com
   Interesting, bizarre and amusing news stories, along with regular photo manipulation contests.
   http://www.fark.com/

Reddit
   User-generated news links. Votes promote stories to the front page.
   http://reddit.com/

ShoutWire
   User-driven listing of global news. Submit stories and join community discussions. Honour board for top contributors.
   http://www.shoutwire.com/