iPhone OS 4 beta 3 emerged and then was quickly pulled.  No matter, Engadget has already got a hands on and discovered that you can now access app controls, such as the iPod’s play and track controls, right from the fave dock in addition to locking the screen.  They say you just need to swipe to the left most screen to access the control.  This seems to be a replacement for the current pop up iPod control when you double tap the home button, provided of course you have that setting in activated.

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