Check out this article about keitai shosetsu, an emergent literary form in Japan, with stories being specifically created for mobile handsets. It’s written by Barry Yourgrau, supposedly the first American author to write “thumb novels.”
A quote from the article:
As for my keitai shosetsu experience, I learnt another lesson beside interactivity’s impact. I re-educated myself in the weight of individual words, and the power of cutting, and cutting more. Writing on a computer tends to encourage flow and verbal sprawl. I actually found myself ransacking old notebooks from the days when I first tried short (when I even embraced the term “prose poem”, quickly abandoned as unwise). The irony, and exercise, of salvaging faded pithy poetical scraps for new life on cutting-edge cellphones was a rich one.