I'm very glad that I'm not the only person on the planet that would love to see a Nikon digital rangefinder! I brought up this topic on a couple of digital forums and was struck down by the angry anti-retro mob.
How did Leica do it with the M8? I'm sure Nikon can do the same. Hopefully Nikon won't price the new rangefinder as high as the M8!
I think that the ideal setup would be a Nikon digital rangefinder with S mount and a new series of optics: kind of what Cosina did with their Zeiss F mount manual focus lens series recently. The new Zeiss lenses are expensive yet they seem to be selling quite well. That tells us that there are still many people out there that despite digital technology are willing to purchase manual focus, quality optics.
If Nikon were to market the new DRF (digital rangefinder) as a low light performer, with a series of new high end optics, the ability to accept old S mount lenses, I'm sure that it would appeal to both collectors and street photographers as well. If they were to price it around the D300 I'm sure they would not be able to meet the demand.