I'm unsure where to place this one, Arkitektkopia has released a very creative campaign - the media itself is quite fun - on the streets of Stockholm right now. The idea is simple, since Arkitektkopia provides great copies, the ads are simply copies of things found on and off the streets in the hood around Stureplan (which is Stockholm's Madison Avenue).
For example, rain drains. Which one is live and which one is memorex? (read more). Hat tip to Swedish adforum Bold for the Arkitektkopia campaign.