Flickr gives you the option of sharing detailed technical information about images by displaying Exif data. When this option is enabled by a photographer you're able to follow the "more properties" link (found under the Additional Information heading for each photo) and get a wealth of information about aperture, shutter speed, focal length, iso settings and camera model.

Most of the time this is more than enough information to figure out what you want to know. But what if you're aren't familir with the camera model? Maybe you want to know if it is a point and shoot, or dslr, or something else? If you're in the market for a new camera and you're impressed with the image quality you've just seen then you you might want to know how big is it physically and what resolution it's capable of. You can find all that info of course through google but easier is better right?

Photocritic blog points out this ingenius camera add-on to help make a photo session a lot more fun for children. Basically you trim the base (the feet) of a pez dispenser, slide it in to your camera's hot-shoe and watch as your subject is amused and entertained by the funny, candy containing creature just inches above your lens.