Danger Girl #0 has shown up on the App Store. Rated 12+ and released by IDW Publishing, the classic series by J. Scott Campbell and Andy Hartnell will reportedly be released in it's entirity on the iPhone OS.
It's not the first comic book to hit the App Store, and won't be the last. Everything from Archie Comics to the NBC show Heroes has been released in one way or the other on the App Store, which is proving to be a new way to check out paperless stories.