jpap, this is the best HN thread I've seen in a while. I never comment, but I'm compelled to now, because it's not often I see a hack this mesmerizing and exciting. For a moment, I almost wanted to drop everything and dive into JPEG myself, something I don't think I've felt since reading about John Carmack and his game engine hacks. Even though I understand <10% of the details being discussed, I'm compelled to learn more. Thanks, jpap. :)