Apple has refused to allow an application called "Comic Reader" in the iTunes Store because they don't like the comic book it ships with -- effectively, they've gotten into the business of banning or approving literature. It seems Apple would approve the application, ComicReader, but not the comic it ships with, Murderdrome. Follow the logic: Murderdrome is NOT an application - it is literature (of a sort). Interesting comment here at MikeCane2008.
Caution: He uses some pretty graphic scenes from Reservoir Dogs - ready for download in iTunes - to make his point that Apple is not comparing Apples to Apples.