I'm in the process of updating my site to make sensor information more accessible.
You can see the result of my work so far in the top two links at my site.
I'm confident about the estimate I have for the D40x sensor performance but would prefer to have some real data.
All that is required is one raw test shot (NEF) per ISO of a particular test image.
There are two different tests so that's either 6 shots for one test or 12 for both.
If you're willing to contribute then please send me an email.
Visit me at Photons To Photos