Just found some info on DR. Not sure if it;s true or not but i think it's more believable than 36mp.
Nikon D800 Specifications
Sensor size: 36.0 x 23.9mm Full Frame FX format
Sensor type: CMOS sensor
Sensor resolution: 18 megapixels
ISO Sensitivity: ISO 100 to ISO 12800 (Extendable to 102400)
Continuous Burst Speed: 6fps (8fps in DX mode)
Focus System: Multi-CAM 3500FX 51-point AF
Video Mode: Full HD 1920x1080p (24, 25, 30fps) and 720p (up to 60fps) with Stereo sound & AF
LCD: 3-inch (921k dots) VGA LCD


