Sounds like the concept of episotolary novels adapted to our times. SMSs, IMs and emails have been included in books before.

Also, this reminds me of the book, Twitterature written (Composed?) by 2 UChicago students. This basically retold well-known texts in the form of tweets. It was a hoot! I found that the retellng was more funny when I had read the text in question in its traditional form.

But of course, I read Twitterature as a printed book.