Considering just how cheap hard drive space and computer power is these days, I find it laughable to worry about the file size of a 36mp image.
I don't think it laughable at all. I only shoot RAW and can see my post-production time increasing significantly. I have a state of the art computer system with huge storage, but even now with 15MB RAW images from the D700, post production takes a considerable time, much of that time loading images into Photoshop.
From what I can see the RAW image size from the D800 will be between 50 and 60MB - that 3 to 4 times that of the D700. Sitting down to work on 50 images will probably take an extra hour - that's a significant amount of time in an already crowded schedule.
One of the REAL issues with the D800 camera will be post-production.
And based on the comments I'm receiving from our customers, many are considering the D800E. I must admit, that I did as well initially, but I don't now believe that the D800E will provide much, if any, of a difference in image quality, but will cause many images to be unusable. Although it's sometimes possible to remove moiré from images in Photoshop, it's not always possible, and it's fairly difficult - certainly not for the faint of heart.
bert