Amazon today put a call-out to authors, publishers or anyone keen on scribing between 10,000 - 30,000 words for their new "Kindle Singles" area of the Kindle Store, which will sell texts "twice the length of a New Yorker feature," or on the other hand "a few chapters of a typical book." Self-publishers with think-pieces or short novellas should whizz them off to firstname.lastname@example.org for consideration.
I am still trying to understand the rational for the kindle. We have laptops and iPads if we prefer to read digital content. If you want a specialized device for reading there's this thing call a paperback.. doesn't need batteries, doesn't break when you drop it, and you can share it with a friend without giving away your entire library at the same time.