http://picture.stanford.edu/Photo/Equipment%20Test/DP2_G1_EP1/Compact_DSLR_1.html
The difference in colour between the two MicrFourThirds camera and the Sigma DP2 is huge! And you cn clearly see the E-P1 sharpness thanks to the weak AA-Filter.
UPDATE: A new comparison is available here (with the DP1 instead of the DP2)
http://www.ukphotosafari.org/e-p1-team-review/2009/7/7/purple-perception-problem.html