what is the difference between the dvi and dvi-d input for a display? i want to get one of the silver apple 23inch cinema displays for a macbook pro that has the newer mini-display jack. i just want to make sure that i get the correct adapter. apple's store has a mini-display to dvi adapter... would this work? does the cinema display have a dvi or dvi-d connection? also, with this adapter, do the usb ports on the back of the display function? or are they connected via a usb cable to the mbp? thank you.