I tell you I'm a sucker for this stuff. And it looks like they creative team is going all out on this viral campaign for the next Batman movie.
Check this out: It's a viral site linked to the upcoming Batman movie. The site has you looking for clues all around different cities. There is a clue in Cleveland and I think I'll go check it out next week. I'm pretty sure I know where it is. If anyone else is reading these clues in the cities listed, let us know what you find. I'd be interested to see how this all fits together.
ON EDIT: It looks like the puzzle has already been solved with the photos. Pretty cool!