Now that's a thought. (OptiPNG exists, btw: http://optipng.sourceforge.net/ http://optipng.sourceforge.net/) The fact is, if you know how JPG and PNG work, you

Now that's a thought. (OptiPNG exists, btw: http://optipng.sourceforge.net/ http://optipng.sourceforge.net/) The fact is, if you know how JPG and PNG work, you'll know that a colorful and busy image like the one linked in the article, with lots of varying alpha colors and values for anti-aliasing, is basically impossible to compress anywhere close to a JPG. There are more lossy ways to compress PNG which aren't done automatically anywhere to my knowledge, such as reducing the amount of colors to fit a smaller color space. What you can also do is turn the image into contiguous chunks so that they are in a pattern that is more compressib… wait, we're just reinventing JPG aren't we.