FYI: TED ( Technology, Education, Design) invites some amazing speakers who are tops in their field. It is held every year in Long Beach and all types of topics are addressed. I remember one lecture about the Sunfish whch was very good. Each lecture is 20 min long. While attendees pay thousands$ to attend the week long event, all lectures are later free online. Interestingly a an event planning company in North Vancouver puts this on every year( thats a long story but a plug for North Van !). A friend of mine works with a team that puts this together then heads down there during the event.