(NOTE: For a few software reasons, now sorted-out, I have not yet update my Mac to Lion (from Snow Leopard), nor iPhone 4 to iOS 5.x (from iOS 4.x)) Some background... • My current Apple ID is "firstname.lastname", which I then have a MobileMe email address associated to it as the Contact Email (ie. "email@example.com"). • Please note here that I have therefore deliberately NEVER used the Apple ID (in my case "firstname.lastname@example.org") given to me automatically when I purchased & set-up a MobileMe email a few years ago. So is the Wikipedia comment correct? AFAIR, when I helped my sister a while ago to move her Mac and iPhone (Lion & iOS 5 were done at the same time), it asked for a MobileMe email (she has her Apple ID set-up the same as I do above, but on trying to use her "firstname.lastname" Apple ID it refused, instead then working using the FULL "email@example.com".) Now this was annoying as it meant she (and from online reading, many users were annoyed by it!) had the 2x Apple IDs issue:  "firstname.lastname" - for anything iTunes/online store related (ie. media/apps purchases/updates).  "firstname.lastname@example.org" - for anything iCloud related (ie. sync of mail/contacts/calendar/other app syncs/etc.). If I wait a bit longer for iOS 5.1, as a current MobileMe user, does this mean that I could use my Apple ID "firstname.lastname" to set-up & use iCloud (and also iTunes store content), when this update is released? In order to avoid completely the 2x separate Apple ID's issue mentioned above. Very curious on this, as it would seem a good idea if correct. As I don't really believe the press reports that Apple are going to definitely put an Apple ID merging system in place (either soon, or perhaps even ever!). Thoughts...?