By all means wait then! The ebook-only is because this is early access, we're looking for people that want to send us feedback and help us with the book without committing to a more laborious review process. It might also be worth waiting in your case because we haven't released the majority of the content yet. The early access should make sense for a wider audience when about ~50% of the book is part of the current release.

We're determined to get a print run but we won't start preparing for print until the book is done in January. For now we've been testing samples from printers and figuring out costs. One problem is that a lot of places charge a lot for shipping internationally so we might need separate printers for US and EU. Another problem is the book's length is going to make things expensive, so it'll have to be a black & white book, with the color syntax highlighting being ebook only. The cost estimates I've been getting for a color print have been $100++ per unit.

We talk about the price a bit in the FAQ at: http://haskellbook.com/faq.html

Thanks for sharing your thoughts.