Looking like it's two straight days of Lisa Ling. Why? Because she hosted a session of TED talks this past Thursday (specifically, part of a spinoff called TEDxWomen), and I just found the video of that session, and we never say no to TED talks around here. She didn't give a talk herself, at least not officially, but hey. No matter. Have some TED talks.
Just note, though: you're about to be sitting here for two hours. That's why these things have pause buttons.