Google invented a new image format WebP to load images faster than before. This new formate will reduce the byte size of the images to load 35% faster than a normal JPEG formate. You can try this developer preview of this new format @ http://code.google.com/speed/webp/.
and you can read more about this release at http://blog.chromium.org/2010/09/webp-new-image-format-for-web.html
and you can read more about this release at http://blog.chromium.org/2010/09/webp-new-image-format-for-web.html