LOL - I dual box when I need to, always with a RAF. Run two characters up to 60 in less than 2 days played each, usually far less, and get a third 60 for free.
Was how I created a whole horde set while Wrath dragged on and on. Probably will be again when I do another Horde set a year or so into Cata.
I use game time zone for my purchases of cards/etc. Once they establish you are who you say you are (they will call you) its instant on future purchases.