B&H created a new dedicated page with some of the available Nikon D850 camera accessories (see the official Nikon D850 accessories chart above).
Several readers have reported that the prices of XQD memory cards has started to go up and some models are already out of stock since the D850 was announced (check availability at Adorama and Amazon)
RRS announced new plates for the Nikon D850 (check also B&H listings).
D850 pre-orders: B&H | Adorama | Amazon | BuyDig | WEX | Jessops
Facebook: Nikon D850 Page | Nikon D850 Group
Additional coverage: Nikon D850 directory