After recent release of much more stable beta 5 of iOS 5, Apple has release beta 6 of the highly anticipated iOS 5. For full communication between your iDevice and iTunes, Apple has released iTunes 10.5 beta 6. which is required for syncing devices with this latest iOS 5 beta to the iCloud.
iOS 5 beta 5 is available to all versions of the iPad, all version of the iPhone 4, the iPhone 3GS, and the 3rd and 4th generations of the iPod touch.
change is available at 9to5 Mac.