the following sites may help

www.photographyreview.com, with user review of lots of cameras/etc

www.dpreview.com detailed info of digicam and sample pics also

www.photosig there's an option of viewing picture by category. there's used to be thousands of nice pics taken by G2, G3,5 are reletively new, but may still get some i guess. Require you to register though.

www.cameraunion.com chinese website, popular. such purchase decisions have been made/discussed by lots of other ppl i guess

enjoy