Canon has released some images of their own taken with the new Canon 1D Mark IV digital camera. The images are here: Canon images.
One of the images is an ISO 3200 image. You can download the entire image from the Canon web site in the link above. Here is the full frame (reduced)
And this is 100 percent crop:
This look like it is going to be a great camera to work with. To my eye it is a full 2 stops better than the 1D Mark III.