For all of you non-jailbreaking iPhone photographers, your iPhone is going to be a fully-functioning instant, always-on-the-go pocket camera with the iOS 5:
Since your iPhone is always with you, it’s often the best way to capture those unexpected moments. That’s why you’ll love the new camera features in iOS 5. You can open the Camera app right from the Lock screen. Use grid lines, pinch-to-zoom gestures, and single-tap focus and exposure locks to compose a picture on the fly. Then press the volume-up button to snap your photo in the nick of time. If you have Photo Stream enabled in iCloud, your photos automatically download to all your other devices.
Now, the questions are: 1) Can we launch a third-party camera app from the Lock screen? 2) Do we still need this?