iPhone OS 3.1 update to add more features and improvements.

Here is a look at some of the updates and additions to be including in the update.

* Video editing on iPhone 3GS wont overwrite the clip over the original when you are editing a clip.
* iPhone will now vibrate whenever you switch to the mode where you can move and arrange icons on the iPhone home screen.
* “Fraud Protection” toggle has been added to settings under Safari.
* iPhone boot time and shutdown and app launching is now faster.
* Voice Control over Bluetooth is now available, allowing users to Initiate calls and control music playback via Bluetooth headsets.
* New APIs to enable third party apps to access videos and edit them.
* Updated AT&T profile to 4.2
* Updated modem firmware to 5.08.01
* Improvements to OpenGL and Quartz.
* MMS is now enabled by default, but still not supported by AT&T.