Preview at WWDC likely in June, followed by September launch.
iCloud and Migration from MobileMe Services Now Live
With iOS 5 and OS X 10.7.2 rolling out to users, Apple has officially flipped the switch to turn on iCloud for all users. The iCloud site lost its beta label earlier today and MobileMe users are now able to migrate their accounts to iCloud once they have upgraded their devices OS X 10.7.2 and iOS 5.
The migration process for MobileMe users will move Mail and Calendars to iCloud, and MobileMe users will continue to be able to use Gallery, iDisk and iWeb publishing through June 30, 2012 even though those services are not making the transition to iCloud. A number of syncing services that had been available for MobileMe, including Dashboard Widgets, Dock Items, Keychain, Mail Accounts, Mail Rules, Signatures, and Smart Mailboxes, and Mac OS X Preferences, will become unavailable immediately upon moving to iCloud.