PDF is a terrible format to submit to the Kindle store. If you want some help, and you're donating all of your proceeds to charity, maybe I can help set you up with something at LiberWriter ( <a href="http://www.liberwriter.com" rel="nofollow">http://www.liberwriter.com</a> )
I was a bit disappointed to find that this was a Kindle book that repackaged a bunch of already-published blog posts, rather than some clever way to publish a blog that would be delivered as a periodically-updated Kindle book.<p>Nevertheless, this is a cool idea. I'd love to see one for Paul Graham's essays (including those written after <i>Hackers and Painters</i> was published) and Steve Yegge's old blog.<p>I also find it strange that Amazon forces you to charge a minimum of $.99, but I suppose that's their way of making sure that they can pay for hosting.
I think it's actually a good idea that Amazon forces a minimum price of $0.99. Otherwise it could potentially serve as a way for certain special interest groups to just spread free propaganda, which could detract from the Kindle environment in general.
Personally I feel when you pay for something, a book, a service or whatever, you are more likely to use it for it's intended purpose.
To get a frequently updated version set a recipe up at <a href="http://readbeam.com" rel="nofollow">http://readbeam.com</a>. It's easy, just did this with TechCrunch and it worked nicely. (This functionality is still in beta but is expected to be released end of this week)
So I get all the feed articles mailed right on my Kindle every day at 6 am and 6 pm (0 6,18 * * *).