Amazon said it'll be trying a new format for the Kindle e-reader called the "Kindle Single." Longer than a magazine article, and shorter than a full novel, Amazon says Kindle Single could be the "perfect, natural length to lay out a single killer idea...well researched, well argued and well illustrated."
Kindle Singles will be roughly 30-90 pages in length (10,000-30,000 words) carry a lower price than a full length book, and be available in their own section of Kindle store.
While this new format could be looked upon as a significant lowering of the bar for content creators ("Don't have years to put together a whole novel? Release a Kindle Single!"), it could also be viewed in a more favorable way: as an outlet for unpublished authors to release serialized content on Kindle.
Either way, it's an interesting move for Amazon to have taken in the ongoing competition to have the most robust e-reader marketplace.