Call Me E-Mail: The Novel Unfolds Digitally
By ADAM BAER
Published: April 15, 2004

http://www.nytimes.com/2004/04/15/technology/circuits/15nove.html

"...[Eric] Brown, 59, calls "Intimacies" a digital epistolary novel, or DEN, terms that he has trademarked.... The story unfolds through e-mail messages, instant-message conversations and Web sites, all within a window generated by the DEN software..."

The article goes on to talk about other versions of new media storytelling.