Does it come with a DVI-VGA adapter in the box? If I skip Wifi and BT right now, how could it be added later? Does anyone make USB Wifi or BT adapters for Mac? If it must be added internally, will they sell me the part and does it just plug into a slot inside like the Airport slots I've seen on PBs? If I buy one off the web site, are they shipping with 10.4 now?