The sixth annual D:All Things Digital Conference was held at the Four Seasons Resort Aviara in Carlsbad, CA this week. Our pick of this years sessions was co-host Kara Swisher interviewing Mark Zuckerberg and Sheryl Sandberg of Facebook. Part one covers Facebooks past and present. Part two discusses digital identity and what steps Facebook is taking to address privacy issues. Video highlights of all other D6 interviews are available for viewing on the D6 Highlights page.