User blog comment:Mobo85/Hot off the Presses: "Across the Second Dimension" Debuts August 5/@comment-5151799-20110613195558

"Phineas and Ferb: Across the 2nd Dimension will premiere on the Disney Channel on Friday, August 5 at 8:00pm ET/PT, with a sneak On Demand preview beginning on August 1." -- Wired.com

This makes it sound like we'll just be getting a sneak peek on On Demand and the full movie still won't premiere until August 5. Good thing, I didn't want to have to ditch the wiki for 4 days to avoid spoilers. :P