Update: the D7100 body only sold out at Best Buy and is now listed as "not available for shipping". The ship to store option is still available.
Nikon D7100 body only is currently in stock at BestBuy. The camera is listed to ship from the warehouse for free in one business day. New D7100 sample images were published today at Photographyblog and Focus-Numerique (including downloadable RAW samples).
The Nikon D7100 camera is also available for rent from Borrowlenses.