Fark often has photoshopping contests.. their current one is photoshopping the poster for "The Two Towers" movie. There's some really good entries in it.
Check it out here - http://forums.fark.com/cgi/fark/comments.pl?IDLink=218455
Check it out here - http://forums.fark.com/cgi/fark/comments.pl?IDLink=218455