+whatever for the external BB interface. Though it may be ugly as sin to some, it is just a superior way to transfer power to the rear wheel. I sort of hate the truvativ/fsa interpretation though. With no pinch bolt to clamp to the humongous spindle, the non-drive cranks work themselves loose sometimes. While regular checking of the 8mm bolt remedys this, I'm really damn lazy and have chucked a crankarm on two different bikes in the last year.
Shimano has it going on.