Many conventions have newsletters appearing once or twice a day. Usually they include last-minute program changes (when not covered in separate pink sheets), party announcements, and general con news. They are usually a single page printed both sides, though some are more elaborate. It's traditional that the newsletter's title is some play on the convention's name or theme.
More detailed con information is provided in a ReadMe, and details of the guests and convention themes in a programme book or souvenir book.