(11/07) Jesus Hates Zombies: Those Slack-Jaw Blues (OGN). I highly recommend Loaded Bible over this title. (There's a variant "cover" I've only ever seen in pictures. I'm not sure if it was an actual variant, or just a promotional image.)
(5/10) Bongo Comics Free-For-All 2010. (On the 2008 version, Bart is shown reading a copy of Amazing Fantasy #15, while eating ice cream and rolling the back cover over - much to Comic Book Guy's horror.)
(10/14) Punks the Comic #1. (variant) [this cover is an homage to Action Comics #1, but the Amazing Fantasy #15 homage is in the top left of the cover]