And the jury agreed that the dark cloud ambient ad from Ogilvy in Bejing should take top honors. It's a black balloon fitted to the exaust pipe of a car, and when it expands well, you don't really have to read the copy to get it. You can see the ad presentation here on the AdofDaMonth site.
Runners up were (in no particular order) Luezer Archive campaign by Saatchi NY, Maglite lighthouse by KingJames, South Africa, Amnesty International by JWT Dubai, Lego: Firestation, Train and hangar by Saatchi Singapore, Ford Ranger: Matchbox by JWT Malaysia