VectorMagic traces bitmap images, turning them into beautiful vector art. Just upload your image and we will convert it for you.
They say about the site:
This site is the result of a Stanford University Artificial Intelligence Laboratory research project by James Diebel and Jacob Norda. We have strived to make the site as easy to use as possible, with a distinct and clear user-interface, while imposing a minimum of fuss. All that is required is a reasonably modern browser, Flash Player and an image you’d like to vectorize.