Valve announces a free update to the Portal 2 Puzzle Maker to allow users to create and publish co-op maps for Portal 2, the puzzle sequel, and that have added a "quick play" feature to ease access to the top-rated maps on the Portal 2 portal. They are promoting this by giving all current owners of Portal 2 coupon to give away to allow a friend to buy the game for 75% off. Here's word:

That's right: Puzzle creators can now design and publish co-op maps, which puzzle players can now greedily consume. Well, as long as they have a co-op partner. Which the 75% off coupon should help them (i.e.: you) find. We've also added a "Quick Play" feature that creates never-ending, auto-generated playlists of the top-rated maps in a variety of categories. It has literally never been easier to figuratively jump in and literally play some Portal.