i'll add the last question after i scan in something that pertains to the last Question 1. can the ipod shuffle do line out thru the usb port? or just charge and update? 2. what parts of a usb port go into chargeing a shuffle? 3. Can i use an AC power adapter that apple makes with a usb hub or something to the like with 2 ipods? (a shuffle and a video) 4. is the electrical lay out diagram in the upper left correctly layed out? it'll change if the shuffle can't use line out feature of the docking ipod.