A new BIOS for the Abit NF7-S just got released, it has a very welcome feature: It will poweroff if the Clear CMOS jumper is set to enabled and the user tries to power-on the system... now I just have to figure out what the default position of the jumper should be since it is not marked anywhere I can see :D.

You can download for NF7-S rev2.0 here, and rev1.0-1.2 here changelog information is available as well.