Do I have to wait until my AppleCare box arrives to register it to my computer? I could have sworn I read somewhere that when you buy it, Apple sends you the Agreement Number in an email but so far they haven't, and of course I can't find where I read that. I just read on Apple's site that you must register before the warranty expires. My phone support expires today. So now I am nervous that I won't get anymore phone support even though I bought the AppleCare today. Anyone know for sure?