Valve announces in-game editor for Portal 2

According to Valve, early 2012 will see an update for Portal 2 that will allow players to create their own test chambers and challenges. This applies to both single-player and co-op chambers. Players can then vote on and share their creations online. This news comes from GameTrailers, who has stated that little else is currently known about the update. There has yet to be confirmation if this new feature will apply solely to the PC version, or if it will include the console versions as well.