Macmillan's US CEO, John Sargent just confirmed that Amazon pulled its inventory of Macmillan books in a powerful response to Macmillan's new pricing demands. Macmillan offered the new pricing on Thursday, just a day after Apple announced Macmillan as a major publishing partner in its new iBookstore -- a revelation that certainly factored into the discussions along with Skiff and other e-book distribution and publishing models. During the meeting with Amazon in Seattle, Sargent outlined what he calls an "agency model" that will go into effect in early March. Under the te