Recent uploads from Josh Sommers flickr page http://www.flickr.com/photos/joshsommers/2703467400 add an even more sinister twist to his original Escherised image below…
Also look at this latest addition to his Droste Effect set, http://www.flickr.com/photos/joshsommers/920662903/in/set-72157594405604955 he’s geting very good.