This morning I published a book for distribution via Kindle. I took the full content of Scripting News for 2009, formatted it according to their rules. That was the hardest part. You have to render it as simple HTML and all the images have to be included in the zip archive you upload. That meant writing a parser that went through the text, pulls out the images, downloads them locally, and patches the URL in the HTML.
I want to write a book, and I have some people I'm brainstorming with. By starting to publish to the Kindle, even in a rough format, I start to get my feet wet. For me, a veteran bootstrapper, this may be a necessary first step.