Not being a smarta** but why do people need that many usb ports on the back of the mobo???
I figure with maybe ~4 you should be good to go especially since most cases have ~2 in them, alot of lcd monitors (at least the dells do) have ~2 in them plus usb hubs that can have 4 or 8, etc. on them. All of these would be more accessable than the ones on the rear of your case for things like flash drives, digital cameras, mp3 players.
Just curious.