The release date for Nikon D7100 is today, and Nikon now starts shipping Nikon D7100 pre-orders in United States. And most stores such as Amazon, B&H Photo Video, Adorama have Nikon D7100 with 18-105mm kit in stock, while D7100 Body Only is hard to find, you may order soon get first shipped.
In Stock Tracker for Nikon D7100:
|B&H Photo Video||Pre-Order|
with 18-105mm lens
|B&H Photo Video||In Stock|