Today Apple seeded out iOS 6 Beta 3 to its developers, within which we were not sure what changes it will bring but now it seems that Apple are now beginning to transit the me.com email addresses to shiny new icloud.com ones:
icloud.com email addresses are now available for iCloud mail users. Users signing up for new Apple IDs, or enabling Mail on their iCloud account for the first time, will automatically receive an @icloud.com email address instead of a me.com email address. iCloud users with @me.com addresses that have been used with iOS 6 beta 3 will receive an @icloud.com email address that matches their @me.com address.
This comes in after Apple recently discontinued the MobileMe service in favor of iCloud on June 30th.