When trying to decide which camera to get it's good to read the reviews (especially at dpreviews.com) but sometimes you just want to compare apples to apples photo quality. While digging around in dpreview's forums I found a link to this site that has photos taken by a bunch of different cameras. The great part is you can choose two cameras, then choose the same photo for each and compare the image quality. You might be surprised at what you see like the G9 being able to take photos as nice as a Rebel XTi at low ISO or how bad the photos coming out of a Panasonic (anything!) are at ISOs 200 and highers.
Imaging Resource Comparison Site