I sometimes use a traditional paper graffiti wall to accompany a novel study, read aloud, or thematic unit.  It gives students an opportunity to express their thoughts in words and pictures and promotes a written discussion.  The SMART™ Board takes this activity to another level.  For a chapter book, you can have multiple SMART Notebook™ pages, one for each chapter.  The larger electronic version of a graffiti wall also allows you to more easily discuss posted comments and questions with the entire class.  It can be left up for students to use while the teacher reads aloud, during silent reading, or as a literacy station activity.