This is strange, I'm sure I've set up auto ISO in the D60 and D80. Are you using custom setting 10 on the D60? Auto ISO is set up through that function, not through the ISO speed menu. It's done in more or less the same way on the D80 (custom setting 7). that's the way they used to organize it, separating it from the auto-program modes (where ISO auto would follow rules the camera sets) and the manual/priority modes (where you set your own minimum shutter speed and ISO maximum).