You may remember a news story before Christmas last year about a couple of advertising posters for GTA IV that appeared on the streets of Belgium. Those weren't final versions and were not meant to be put up. However, it appears the final versions are now in circulation thanks to a photograph from Flickr user freshyill.
The poster shows an email address, [email protected], which if you send an email to will auto-respond with a piece of artwork and message informing you they're all out to lunch.
The email response: see it here