The Nikon D5300 is now available in stock at retailers! You can find the D5300 in stock at Cameta Camera:D5300 body in black or red. It is also in stock at B&H Photo in red. The black and grey versions are available for pre-order at B&H.
You can also search Amazon for the D5300 in stock, several third party sellers have it available.
The D5300 is also available as a kit with 18-140mm lens and includes a $300 instant rebate. The offer is good through Nov 23, 2013 but will likely be extended through the holidays.
The D5300 represents the first DSLR from Nikon to include built-in WiFi and GPS. It also boasts 24.2MP digital CMOS DX sensor with no anti-aliasing filter for maximum sharpness. It also includes the newest EXPEED 4 image processing engine to provide 5fps continuous shooting and has the ability to record 1080 HD video at 60 fps.