Project Natal's launch window: October 2010. GamerTagRadio has the clip of Microsoft's Syed Bilal Tariq saying, "We will be in a position to confirm the date after E3, which is in June. But definitely it is going to be October 2010 and we will have it in Saudi Arabia for sure."
The last official word we'd heard about the all-seeing, motion-tracking peripheral's launch date was "holiday season 2010." With E3 a little over a month away, we're expecting to learn specific dates soon -- likely at Natal's standalone press conference.
Update: G4 reports that according to Microsoft, "Syed Bilal Tariq is not a [Microsoft] employee ... He is a vendor employed through a third-party company on behalf of the Microsoft subsidiary in Saudi Arabia." The company also wouldn't comment on the alleged October launch window.