So....I am curious, played around with it and it seems to be unlikely. I have an iMac 27", a MBA, iPhone 5, and an iPad 4. My wife has an iPhone 5 with her own itunes/iCloud accounts. But my iPad has since been "acquired" by my wife, she carries it around and uses it extensively around the house. The iPad is setup under my itunes/iCloud account. Now my question is, I want to call her on Facetime on the iPad, so it would essentially be me calling myself on 2 separate devices. Can this be done without switching accounts on the iPad? I say this because all the iPad HD apps are bought using my account, so I don't want to disassociate my account. This can be also extended to using my iMac/MBA to call the iPad as well.