Search engine marketing guru Danny Sullivan says small-time businesses are stealing other's listings in Google Maps. "Florists, locksmiths, payday loan companies and others have found their listings hijacked in this manner." It's a hack so obvious I'm surprised no one at Google thought of it: You can edit the listing for your competitors to include your business name, URL and phone instead of theirs. Wikipedia meets the Yellow Pages! Vint Cerf totally saw this coming. Too bad no one listens to him.