Yes indeed, I like this a lot. If you are an IATEFL member you may have seen this already but if not do follow it up. In the November-December of IATEFL Voices Elaine Williamson has an article on using e-books / e-publishing to encouraging student writing and indeed, collaboration. http://www.myebook.com/esolsaturday/ gives an insight into what she has done with her students. So much potential here.