Hey guys.. it's coming up on 1 year since I bought the rMBP. I was wondering if anyone has purchased the AppleCare warranty by adding it to the cart from the Apple Store and checking out - receiving something in the mail a week later. In the past, I've entered my serial number, clicked the extend warranty button and paid full pop. But if I can just buy it by adding AppleCare to the cart without entering the serial number I can use my company discount and save 10%. I've just never done it like this so I'm wondering if you purchased AppleCare this way, do you get something in the mail and then register your serial number afterward? Thanks..