Got my D3 today, charged the battery all afternoon, and shot some ISO3200 shots around the living room in the evening with a 50mm f1.8 handheld and incandescents overhead. I'm very impressed. There's definitely a fair bit of grain, but coming from my D50 and D80, it's a huge leap in noise performance.

Any lack of sharpness is camera shake. No processing other than WB and JPEG conversion.

The thing so far that's impressed me the most is the 3D AF tracking. With two young infants always on the move, it was great!