There have been some recent winners announced for a few annual contests:
I’m adding the following links to The Best “World Press Photo” Winners:
Every World Press Photo Winner From 1955-2011 is from BuzzFeed.
World Press Photo Winners 2012
World Press Photo Awards Announced 2012 is from TIME.
They haven’t actually announced the winners yet of The Sony World Photography Awards 2012, but they have made their “short list” public. Here’s a slideshow from The Guardian. I’m adding it to The Best Of The Sony World Photography Awards.