Here are a couple of long exposure shots with the new cam. Noise performance is really great compared to my old D200. The last two photos were taken WITHOUT long exposure noise reduction.
Verdi bridge (look closely for the train), 12 mins, f/8 @ ISO 200 with the fisheye, daylight WB.
Robb Drive Overpass: 6mins, f/8 @ ISO200, noise reduction off, 12-24mm