Retrievr

Retrievr is a valiant attempt at a new way to search images.  Just make a quick sketch of what you are searching for, using the tools provided, and Retrievr will search popular Flickr photos for matching images.  The search works by using an algorithm that identifies similar rough shapes and colors.  It's not perfect, but pretty amazing.  The creators consider this an experiment and seem eager for any feedback.  Try it out here.