Tiny billboards. Seen 'em. They're very cute. Sometimes they even make sense for the client. Even Andy and Joe have a wee one in their portfolio. The first billboard shown here is the most recent, for Smart cars - "small is beautiful", from BBDO, Toronto, Canada. Very adorable. aaaw. Back in 2008 Deutsch/LA did tiny billboards for "Little Big Planet". Also very cute. My favorite though is Johan Van Oeckel's work for Antwerpen Miniatuurstad (miniature city) back in 2006 - he didn't just have tiny billboards but also tiny ad trucks driving around the streets. Win!