Apple's iOS 6 Beta 3 has hit developers today, and it looks like the company updated their change log, revealing that they're in the first stages of moving over me.com e-mail addresses and Apple IDs available under MobileMe to new addresses using icloud.com.
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.
MobileMe was discontinued on June 30 in favor of iCloud, but MobileMe users are still able to transition their accounts to iCloud, but for a limited time only.