I ordered Applecare with my new iMac. I got an email, an "invoice receipt," for the Applecare that just mentions the order, that it was paid, and whatever else. On the Apple Order Status it lists it under the header "Complete" as opposed to "Not yet shipped" or "Shipped." What does this mean? More generally, can someone explain exactly how Applecare works? I should be getting a box, right? What is in there? How is Applecare set up? Thanks.