I just recently discovered this picture as a really cruddy jpeg file with lots of artifacts. I liked it so much that I spent several hours yesterday redoing it in Inkscape. While there are small differences, they're not very noticeable. I'm posting the results here so others can enjoy it, too. You can click on it at the left and save it (PNG, 1280x1024 for desktop wallpaper) or save the SVG version.