Once our tax rebate comes in, me and the wife are buying iPhones. We have one Mac with 1 user account. She never uses the computer so I never gave her her own user account. She does like to listen to her music every now and then. Since I don't want her music mixed in with my stuff, I created a seperate iTunes Library for her. I just hold down Option and lanuch her Library when she wants to listen to her music. Anyway... We plan on getting the 2-line family plan. So once we have the two iPhones, how do we activate and sync them? Do I activate hers under her installation and mine under mine? Or do I activate them both under mine and then sync then after the fact with our own libraries? Does iTunes/AT&T know that one phone is part of the same plan as the other phone? The point is, I don't want us to have to sync to the same library. I want us to keep and sync to our own libraries and both be on the same family plan.