Kindle formatting is also very hard to get right. Very often the top negative review of an excellent print book is "GGGGRRRRR, the kindle format is UUGGGGLY and doesn't work!!!!!!!?!?!?!"
Not the kind of publicity you want. If you're pricing on value, better just to avoid it.
I have bought many technical books on Kindle but now I am realizing that Kindle is not suitable for technical books especially when there are a lot of side bars, code snippets.
I don't like reading on ipad or laptop though. So I have started buy print versions of most technical books.
I'll also add: Nathan seems like a good guy. I met him at MicroConf Europe, and he came across as knowing his stuff. I'd probably buy a book from him.
But what if everyone sells their own books on their own site? Things could get chaotic really quickly.
I guess time will tell...
It's certainly good for the authors, as they get to keep pretty much everything from the sale, whereas with Amazon, at best, they're going to get about 70%.
For whatever reason that I find difficult to spell out, though, it also means I'm more reticent to buy these sorts of books.