Looking to buy a new camera? This quick flowchart from Optics Central may help you decide between a DSLR, Point & Shoot and a Camera Phone based on your shooting requirements.
You can then use Flickr’s Camera Finder tool to compare sample shots and relative popularity of various cameras in the market. Google’s Picasa service also lets you find photos by Camera model. Thanks @AshuMittal and @BeastOfTraal.