In a recent email update to users signed up for iPhone updates on the Apple Inc website, Apple indicated that they are holding to their June release date for the iPhone. The email quipped to recipients: "Thanks for signing up. You'll be the first to hear the latest about iPhone -- coming this June. That gives you just enough time to think of ways to break the news to your current phone."
Unconfirmed reports further detail this date to be June 11, though these reports are still largely unconfirmed.