I got my Ds tonight... it's a little gem. It cost me around USD833 body only in Taiwan I don't know whether this info has been posted before, so I'll post it again. And the first thing I checked was the use of MF lenses. When set in M mode and the use of the aperture ring, the correct exposure will be measured, set and locked by a single press of the AE-L button without the need of using DOF lever... Just like the green button on the istD... Fantastic!
Cheers Andy