The very early easy photo sharing sites appeared in the mid to late 1990s, but were mostly created to provide online print ordering. More appeared in the early part of this century, primarily to provide centralized access to photos. At the same time, desktop photo management systems appeared. These were not Internet based, and still aren't. They provide a way to manage photos on your computer, and sometimes have links to online storage sites. A true site will allow you to easily share your photos across the Internet with the people of your choice. Exposing all your photos for the entire world to see is not really sharing - it's really more like a neighborhood open house for your photos and lacks the intimacy of sending a photo to a friend or relative.
http://postpiks.com