The quarterly Japanese "digital camera magazine" published by Impress Group of Japan always make original images available on their website in association with articles printed in their magazine. Just released are a set of very interesting samples taken with the Nikon D1, Canon EOS-D30 and Fujifilm S1 Pro.... This material is like gold dust right now.

Canon EOS-D30 galleries

Canon EOS-D30 vs. Nikon D1 vs. Fujifilm S1 Pro

Other digital camera samples