Japanese camera site DigitalCamera.jp has posted sample Sigma DP2 pictures they took in Vegas during the PMA trade show. The sample pictures are currently at the top of the page, but because they don't have permalinks to individual posts, they will go further down the page as the days go by and eventually you will have to look for the in the Archives for early March 2009.
RAWsumer reviews at the Compact Reviews Organizer
CANON: G11 S95 G10 G9 S90 SX1is
PANASONIC: LX5 LX3 LX2 FZ50 FZ100 FZ40/FZ45 FZ38/FZ35 FZ28
RICOH: GRD III GRD II GX200
SIGMA: DP2 DP1
NIKON: P7000 P6000
CAMERA DIARIES: Panasonic LX3 Canon G10