The first Nikon D500 reviews and sample photos started to appear online – check out this first look article from Hardwarezone. Sample photos at different ISO (100% crops) are available at Clubsnap forum:
Another set of ISO samples was posted on dpreview.
Some interesting Nikon D500 videos:
A short demo of Nikon D500 Electronic Vibration Reduction mode – it reduces the effects of camera shake in the horizontal, vertical and rotational directions during hand-held movie recording and works well with the lens VR:
Another video of the D500 AF in extremely dark conditions:
The Nikon D500 camera is scheduled to start shipping in one week (April 21st), pre-order options are listed here.