Here's what you can do to test the idea: Is it possible that you take the image in FX mode, and then crop the image 1.4x? Then it will be easy to look for imperfections.
Actually I like the DX crop the way it is. 1.5x is easy to multiply and divide by too. I don't want Nikon to go like Canon, with too many crops of sensors. I don't mind them adding a 1.2x crop to the D3S, I just don't want them to make a third sensor size.
Think about the problem with the 1D series. It doesn't accept Canon's "DX" or EFS (I think?) lenses, so it has to use full frame lenses. That means you can't get any super wideangles without starting another series of lenses, and would just make everything super-crazy.
I don't think that really matters and BTW it looks like we might see a 2.5 crop factor
Anyway I was just wondering what would be the ultimate D300s replacement, because a 1.4 crop 18MP would be certainly be better than a 1.6 crop
Does some one here have a Nikon 10 - 24 and a D700 to see app if this would work, because like Tedd said it has to work with current lenses, I think this lens would be the problem area