I've just upgraded my parents to iCloud on their phones, and just realised that they are running Snow Leopard on their home Macbook Pro. Possibly a little premature! To date they have been syncing contacts and calendars with iTunes (without MobileMe). I have told them not to USB sync their iphones with the Macbook Pro, and am now wondering what the next step is! 1. Can they continue to USB sync with iTunes? Will the new iCloud contacts sync properly with their Macbook Pro contacts? 2. If not, I'm guessing they should just upgrade to Lion, switch on iCloud, and choose an option to overwrite (rather than merge) the contacts on their Macbook Pro. Does this sound sensible?