Writing on the PSBlog, Asad Qizilbash, Marketing Manager at SCEA, has confirmed that inFamous will not be releasing in June as first thought. Instead the game will be releasing a few weeks earlier on May 26 in the US.
The post also confirmed the release date for the demo, which will be out on the PlayStation Network on May 21 for everyone, and an early access demo will be available from May 7, possibly through Qore subscription. Although a comment by Asad on the PSBlog post reads:
"if you’re interested in trying the demo early, I’d recommend you look at either Best Buy or GameCrazy"