[UPDATE] Since this article's publication, Valve issued the following statement: "There's a story making the rounds regarding Portal 2 support for PS3 Move. Unfortunately this quote was 'lost in translation'--Portal 2 does not include support for Sony's motion controller." The original article--which quotes the PlayStation Blog story accurately--is below.
Back in 2007, Valve cofounder Gabe Newell was one of the PlayStation 3's greatest detractors, calling the console a "total disaster." However, that all changed at last year's Electronic Entertainment Expo, when Newell made a shock appearance at Sony's press briefing to announce Portal 2 was coming to the PlayStation 3. He also went one step further, saying that the PS3 version of portal would be the best version of the game, thanks to Steamworks support on the PlayStation Network.
Today, the world learned another reason why the PS3 edition of Portal 2 might be preferable to its Xbox 360 and PC counterparts. Speaking to the German PlayStation Blog, Valve writer Chet Faliszek revealed that the game will have "full support" for the PlayStation Move motion-controlling system. He did not reveal if the game could be played with just one LED-emitting controller, or whether (more likely) the thumbstick-equipped navigation controller would also be required.
Though he did promise eventual complete Move support, Faliszek did warn that "Move is a completely new experience for us, so the system is not yet fully integrated [into Portal 2]." It is unclear if the game will have Move support at launch or if will be patched in later, as it was with Heavy Rain and several other titles last year.
Faliszek also ruled out a 3D version of Portal 2. He said that the game's heavy emphasis on "spatial imagination" would be overwhelming in 3D, so the developers opted against it. He said such new technology would have to have been an integral part of development from the beginning to make sense--and in this case, it wasn't.
Portal is set to ship for the Mac, PC, PS3, and Xbox 360 on April 20 in North America, with a European release two days later. For more on the game, check out GameSpot's latest preview.