A short but informative email from our friends at Valve...
The rumors are NOT TRUE. Don't believe the hype. Here's the official word straight from Valve's email:
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.
So you see, no move support, not that they'd ever lie to us... (something about never publishing on PS3 is ringing a bell here).