From the Wired article:
In most ways BIL was everything TED is not. It was younger, rowdier, lower-rent and much more undisciplined. But TED has passed on to BIL perhaps its most important characteristic: It's a place where people share big ideas. Topics at BIL ranged from Aubrey de Grey's efforts to extend life indefinitely, a talk on gifted education by an educator who also went through the process, one man's experience as a foreign aid coordinator in Africa and a quick lesson in the state of the art in stem cells.