On Sunday evening, Amazon came to its senses and decided to allow Macmillan to set a price of $12 to $15 for new e-books. As of Monday afternoon, the buy links for Macmillan had not yet been reactivated, though.
The more I read, the less I understand about this issue. There are so many pricing points and percentages and sales models. I have never worked at a bookstore or in a publishing house, so the finer points elude me.
Lots of other people have interesting things to say, though. Here are a few:
Andy Ross in his Ask the Agent blog
Author Charles Stross