It'd be a matter of figuring out a way they can sell an ebook without cannibalizing sales of the paper book (the hardcover now, and then the paperback when it's released...next year, was it?). As a publisher they're all set up to produce and make money off of their paper books, but nobody really knows what to do with ebooks.
Make them open, knowing that they'll be copied across the internet? Stuff them with DRM so they can't be copied, but so that nobody wants to buy them either? Tie them to a transient piece of hardware so only people with lots of spare cash (or only within a single country, like the Kindle) can even buy them? My opinion is always on the "open=good" end of the scale, but for a business it's a tough decision.
As far as price goes, publishers generally say "this book is worth $x" so they set the prices of both the ebook and paper book somewhere around there, and you get the weird situation that the ebook version with no printing or storage or shipping costs, costs more than the Amazon-discounted paper version. This feels rather kittywompus to the consumer, so ebook sales aren't so huge. Like Bruce touched on in the other thread, consumers tend to think they're buying the medium (a "lighter" medium theoretically implying lower costs) while publishers focus on the content that they're selling (so the price should be more or less the same).
I appreciate that Hay House is making Steve's book available in PDF for the international blogger people -- it implies they're not completely clueless, as international shipping is a non-trivial cost. I just wish I had a qualifying blog!