The latest rumor is that Nikon's Mirrorless Interchangeable Lens Camera will be announced at CES 2011 (January 6-9, 2011). It is not typical for manufacturers to announce high end photography gear at CES (Consumer Electronics Show). If this rumor turns out to be true, expect the Nikon EVIL camera to be a consumer product (not really a surprise). I would rate this rumor at 40% probability, since it came from only one source.
Nikon had a giveaway at the PDN Photo Plus Expo and one of the questions on the survey was "Will you be considering the purchase of a Mirrorless Interchangeable Lens Camera within the next 18 months?"