Yahoo UK is giving away a signed Cosmopolis Poster, signed by Rob and David Cronenberg... And because we know how many of you are as nuts about Robert Pattinson as we are, we’ve got our hands on a SIGNED poster by the man himself! To celebrate the release of RPattz’s brand new film COSMOPOLIS we’re giving away amovie poster signed by both Rob and director David Cronenberg. The film, which is out…