Apple's senior VP for Internet software and services, Eddy Cue, testified today in defense of the company at the Department of Justice's ongoing antitrust trial over e-book prices. Cue was responsible for negotiating publisher deals to help launch the iBookstore in 2010. Apple is accused, however, of colluding with publishers to switch the e-book industry to an agency model, specifically with the aim of forcing prices higher and undermining Amazon's then-standard $10 pricetag.