Via Mike in a comment to a previous post, Marvel has some of their comics in a web format, including three by Kirby (ETERNALS #1, BLACK PANTHER #1, FANTASTIC FOUR #1). The interface seems more than a bit clunky, and you have to register (for free) to see more than a few pages of each issue, and there are other oddities (check out the date they claim ETERNALS #1 was published!), but check it out if you want.

http://www.marvel.com/digitalcomics/