Here is a changelog of new iPhone firmware 3.0 beta 3 ^[1]:

• The “Store” entry in Settings App still links to a blank page.
• The keyboard background becomes black in every phone number box. It may be a bug.
• The Skype app gives an error on its first launch.
• Greater overall speed.
• Sometimes the SMS sending freezes. It could be caused by the keyboard bug.
• Better integration for Push Notifications APIs.
• Better Audio APIs (probably for A2DP).
• Error correction works better.
• iTunes synchronization now requires less time.
• Youtube app now works on every device.
• The MMS and Tethering old bundle does not work anymore.
• Spotlight saves last seach data.
• Users can assign home screen.
• Parental control.
• Users can disable In-App Purchase ^[2].
• Ability to hide the text of a message just received.