The mad geniuses at Valve have this week signaled their intent to deliver the second substantial content update to Portal 2 by early next year, Valve time permitting.
The content in question is primarily focused on providing Portal 2 owners with an easy to use map editor, allowing players to create their own test chambers which they can then share with the community. Players will have the ability to create both single player and co-op content and the community will then be able to play and rate user-created maps, thus vetting the quality of what is sure to amount to virtually endless reams of game content for Portal fans.