sentences:  Schiller frequently played a supporting role in keynotes given by Steve Jobs, usually presenting new products like iPhones and iPads.While Jobs was on medical leave Schiller gave several keynotes including Apple's last appearance at Macworld/iWorld on January 6, 2009 and the WWDC keynote on June 8, 2009; both presentations were typically done by Jobs himself.Among the things announced at these events were the updated MacBook Pro lines, the iPhone 3GS, and new versions of iLife and iWork as well as pricing and DRM changes to the iTunes Store.