Ok, so I found the Private Message module which can handle all of Litillo's messaging needs, yay! I have decided that I'll need to have separate roles for Artists, Illustrators, and Regular users (or Patrons). So I need to add a module to allow users to select their own Role. Also, I need to somehow manage editions. That will probably just be done with Flags and Rules. (I've seen Drupal systems in place for Editions before, but they don't work quite the way I need them to)