I hang wallpaper and love to share information about its history:
http://wallpaperscholarblog.blogspot.com
http://www.wallpaperscholar.com
The Dutch Kunstpedia Foundation runs a rich online content site for the fine and applied arts. In this interview the way that the "Backstory" fits into the rest of wallpaper history is addressed:
http://www.kunstpedia.com/rediscovering-the-history-of-wallpaper-during-the-age-of-enlightenment.html