1--No rule required. Go to Tools-Services, Delivery tab and tell it to deliver mail to the (other) inbox. You don't need a rule to do this.
2--Any "secondary" calendars don't behave like the original. You can't share them with others either. I suspect you can't automatically synch them either. Why not just use offline folders?
2--Any "secondary" calendars don't behave like the original. You can't share them with others either. I suspect you can't automatically synch them either. Why not just use offline folders?