A quick question as i'm not sure on the process, I'f I buy the iMac on friday 27", do they take the money out of my account this friday, or do they take it out when its ready too ship? I know with pre-order's for other websites they generally take money out as its ready too ship, but don't know with apple, but would like to get my order in and potentionally go for a few BTO options if I have another month too save more....