With the new camera in the iPhone 4 received the unit and a LED flash. In practice this is mainly in low lighting, or as a lamp when you once again groping in the dark. But Apple already tinkering seems to improve for future iPhone releases.
It is to be rotated, reveals a new patent application [1] from Apple. Using a sensor should be able to illuminate this the image best. As with auto focus, this is also controlled via the touchscreen. The application gives no indication of when we can see the new flash in action.