iPhone OS 4: orientation lock, iPod controls in fast app switcher

Today’s iPhone OS 4 beta 3 update has brought with it some interesting new features, including a soft-version of the iPad’s orientation lock and iPod controls added into the fast app switcher (multitasking) UI.

When you double click the home button to bring up the fast app switcher, you can now scroll all the way to the left to get the new orientation lock and iPod controls. The default on the orientation is off but a tap will turn on, or turn off, the lock. (Home screen doesn’t sound like it rotates, however).

iPod controls include back, play/pause, and forward, with the name of the current track written beneath.
The background for the app switcher (and for folders) has also changed from the rubbery, pock-mocked, dark gray of beta 1 and 2 to a new cross-hatched medium gray.