Aw shucks, so far the D3 lacking features compared to the D300 is sensor cleaning and lower flash sync (and pop up flash for those who use it).
Think the lower flash sync is because the curtain got to travel a longer distance.
Maybe wait for a higher MP count D3X or a FX D300X. ;p But D3 is good because the pixel size is between 1Ds and 1D mkII. So should be no problem closing the aperture down to f/22 before diffraction limit kicks in.
I would like to try Sigma 12-24/4.5-5.6 with the D3.. hehehe.. ;p