Neither version 1.0 or version 2.0 indicate they support power on by USB keyboard. Both manuals specifically state that a PS/2 keyboard mouse with a PSU giving 1.0+ amps on the +5VSB line can support power on by keyboards/mouse.
Most boards that I have seen that support power on by a USB Keyboard/mouse will have a jumper just behind one of the USB ports that when set will provide +5VSB power to that usb port thus allowing your keyboard/mouse to send a signal back and turn on the computer.