They're not done. Now, even though the Supreme Court has not yet agreed to hear the case, a basketful of amicus briefs have been filed.
Publishers Weekly has the news.
With slight variations, all of the briefs essentially argue Apple's point: that the court incorrectly found Apple liable for a “per se” case of price fixing, rather than applying the more stringent “rule of reason” which, supporters claim would have exonerated Apple.