What I'd like to see is a PSU that sends a sleep signal to the MB, and also when needed a power off signal. This would take advantage of hybrid sleep present in Vista/ Windows 7. Going to sleep with acc off could keep the pc on for hours (you'd just need power to the RAM modules), and ABSOLUTELY instant on when you return and the IGN is on again.
You could set the bios to sleep in the signal is received and power off only if the signal lasts longer than 4sec. But most PSUs can't be programmed to do that, and this is the case with this one, right? I had hopes that the USB control could offer that option.