Thanks to the settlement, Amazon can now [again] charge what it would like and the result was an immediate drop for titles by publishers that settled. Consumers were hurt by Apple and have benefited from the DOJ's case against Apple's business practices.
http://www.politico.com/news/stories/0912/80961.html
> The settlement approved Thursday requires the publishers not only to kill their contracts with Apple within a week but also to end contracts with any e-book retailers that specifically place restrictions on a retailer’s ability to set prices on e-books. And the settlement also bars the publishers from granting a retailer “most favored nation” status for five years.
And: http://www.mhpbooks.com/amazon-begins-discounting-macmillan-...