Comics I've posted in the past:
I'm not sure anyone has actually noticed this or not, but each time I've posted a cartoon, each frame has been a separate image. I got the idea 6½ years ago [6], although from where I don't recall.
I do think it's still a good idea because it facilitates a liquid layout for a comic (the frames only take up as much horizontal space as needed) while allowing for a larger frame. The frames on my experimental comic [7] are 320×240, which are large compared to most online comics, while at the same time, allowing for a very narrow browser window.
I've even put the idea [8] out there [9] and had some positive feedback on it, but I've yet to see any online comic actually implement the idea, and I don't understand why. Perhaps it's not as good an idea as I think it is? Or it's, oddly enough, too constraining? Perhaps Howard Aiken [10] was right when he said, “Don't worry about people stealing your ideas. If your ideas are any good, you'll have to ram them down people's throats.”
I don't know, it seems like an obvious idea to me.
[7] http://www.flummux.org/samurai-admin/2002/01/20/
[8] http://www.websnark.com/archives/2005/03/oh_my_god.html
[9] http://www.talkaboutcomics.com/phpBB2/viewtopic.php?t=26987