This is pretty good. It's in New York at the moment, and is by Dustin Spagnola. Obviously similar to Banksy's graffiti, but still a clever idea and well excecuted.
This is obviously based on Banksie's work, but it is still excellent. It was put up to advertise the Nathan Barley series a year or so ago (l think it was broadcast then, but l can't be bothered looking it up). Clever idea.
Look out for rabbits pretty soon, that's what l say.