Apple is confirming that the existing MobileMe services of iWeb publishing, Gallery, and iDisk services will NOT be making the transition to iCloud. Some of these functionalities will, however, be replaced and/or enhanced with the already-announced photo and cloud services in iCloud.
Cloud is Apple’s new cloud service, which stores your music, photos, apps, calendars, and documents and wirelessly pushes them to all your devices. iCloud integrates seamlessly with your apps, so everything happens automatically. iCloud will be free for iOS 5 and OS X Lion users.
A full item of features making the transition to iCloud may be found here.