Domenico Fiormonte drew my attention to an interesting seminar coming up next week in Valencia at the Menéndez Pelayo International University (UIMP) on Editando al autor. El escritor en la sociedad de la communicación (PDF). The seminar brings together editors, authors, new media researchers and philologists on the subject of the writer in a society of communication.
Domenico has an interesting web site Digital Variants which makes available various the writings (and variants) of various contemporary Italian and Spanish authors. On the Digital Variants site they are experimenting with systems of frames to allow readers to compare variants. Here is one example of a Vincenzo Cerami Variants Machine
created by Mario Macciocca.