Is it meant to work already? I have an iPhone, Mac and iPad. I noticed in the Mountain Lion preview it says if you message on an iPhone. . .then you can continue the conversation on your iPad. Does this work already or is it only on Mountain Lion. The reason I ask is that. . .if I go from my iPhone to iPad/Mac - the messages I've sent won't be there. . I'd have to compose a brand new message and send it to that person - and even then I'll appear on their iPhone as a different person - then when they reply they will get a new conversation (so I'll have two different conversations instead of just one). Does anyone know how to set it up? I guess its because I have my old Apple ID. . . .my new Apple ID (an msn email address). . .and iCloud address (@me.com) and a phone number. Does anyone else have this problem?