Patrick Rhone writes long-form posts on his iPhone. Really. (by ojezap)
I just did a word count and over one-third of my new book, Minimal Mac: What We Believe In, was written on my iPhone. Since it is simply a collection of the best writing from the site and a lot of of what has been written here over the last three years was composed this way, it really should not have come as a surprise to me. But it did.
Also of mention, both of the essays cited in the video are included in the book.