Apple is expected to release iOS 5 within weeks, and one of the main feature is its integration with Apple’s cloud based offering iCloud. It is safe to assume that Apple will release iOS 5 and iCloud together.
iOS 5 and iCloud is currently under beta testing by its developers. Apple in beginning of the week, announced to its developers that all test data in iCloud will be reset on September 22.
On Thursday, September 22, the iCloud Backup data will be reset. Backing up to iCloud or restoring from an iCloud backup will be unavailable from 9 AM PDT – 5 PM PDT. If you attempt a backup or restore during this time, you will receive an alert that the backup or restore was not successful. After this reset, you will be unable to restore from any backup created prior to September 22. A full backup will happen automatically the next time your device backs up to iCloud.
This is a significant milestone as it hints that iCloud will be reset to a state ready for live data. Which suggests that iOS 5 Gold Master (GM) release will arrive on September 22 or shortly after. A GM release normally precedes the final release. For past iOS release, a final release normally comes within 2 weeks of a GM release.