Imaging Resource has added the Sigma DP1 to their excellent Comparometer. This tool allows one to compare various production cameras by using images taken under carefully controlled circumstances. Take a look at the DP1 "Still-Life 100" file with special attention to the fabrics. The Comparometer makes it clear that, compared with the DP1, Bayer sensor cameras truly suffer in reproducing details in the red fabrics. I've upscaled the DP1 "Still-Life 100" file to 12MP using Genuine Fractals, and I think it holds up extremely well. On the other hand, it is a testament to the Canon G9 how well that camera's small sensor keeps up in direct comparison to the DP1, even at higher ISOs! It's really too bad the Ricohs are absent from the Comparometer.

Keep in mind that the Comparometer uses in-camera JPEGs and therefore does not necessarily represent the potential of RAW files from the DP1 or other cameras.

EDIT - I just saw that 1001 Noisy Cameras already had the scoop on the Imaging Resource images. Those guys are fast!