You can also publish a book on Kindle in a matter of minutes. As an experiment, I put a number of my writings (some never published) in Kindle format, then uploaded them to be published. Now anyone with a Kindle can buy it for .99 cents; I was going to make it .01, but .99 is the minimum for some reason. I think you make .35 cents for every dollar sold. You can't check them out here:
It's almost silly to buy books on the Kindle when there are literally thousands of classics in public domain. I've been downloading a lot from FeedBooks.com and ManyBooks.net. These books look just as nice as the ones you pay for.
One of the things I love about the Kindle is reading newspapers, blogs, and magazines; I like to keep books on my shelf, but newspapers and magazines are pretty disposable. Reading them on the Kindle works out great; I save a tree, and the navigation on them is pretty nice. It would just be nice to have more to buy.