There is the reading of actual stories that is just so convenient, especially when commuting, and not taking up too much room in the bag, but the other thing I love it for, is being able to send a word document to the Kindle email address and, like some sort of witchcraft, the document is there, waiting to be read. Its especially good for reading through a manuscript (which I am doing now) and being able to enlarge the font so you don't miss as many typos. Bodes well when the day comes when I need reading glasses and have to REALLY ENLARGE THE FONT.
While I still like to read a manuscript printed out on paper, reading a document in Kindle format is like reading the book once its published, and its a whole different experience: you just see things you don't see in 12 point Courier on your laptop.
Admittedly I was in possession of a Kindle for about three years before I realized you could actually do this, that is send your work to it, but it has made proofing a manuscript so much better and, in fact, any document you want to read.
Just a little Kindle tip.
|Obviously this is not a Kindle, but just a random picture of my bookshelf. Note the OCD organisation!|