According to Yodobashi camera (Japan) the Nikon D800 will start shipping on March 22nd, the D800E on April 12, 2012:
Nikon D800/D800E is “Eye-Fi Connected”: “When used with an Eye-Fi card, the Nikon D800 / D800E stays powered on until wireless media uploads are complete, has an onscreen icon, and offers the ability to enable/disable the Eye-Fi cards Wi-Fi via the camera menu.”
