In a week or so, my wife will be receiving a 15" Macbook Pro. Currently, all of our iPhones and iPods are synched with my MBP and I have my iPhone doing nightly backups to iCloud. I would like to have my wife's iPhone start backing up to iCloud (notes, calendar and photostream) and synching with her MBP for everything but music. She doesn't want to mess with managing music so all her songs and playlists will still be synched physically from my MBP since it contains our music library. Will I be able to use the same iTunes account for both MBPs so we can get apps on both MBPs without buying them twice, yet sign my wife up for her own iCloud account so our contacts don't get all screwed up between phones during wireless synching? Also, I use an external HDD for Time Machine and SuperDuper backups. Will I be able to use the same external HDD for her Time Machine and SuperDuper backups or should I pick up another one for her? I thought about using Time Capsule for wireless backups but I can't justify the cost. This is exciting new territory for me!!!