Diego Caleiro, a past SI visiting fellow and current leader of a transhumanist institution in Brazil, recently delivered this TED@SaoPaulo talk on Friendly AI and Effective Altruism. If it goes viral, it has a chance to be selected for TED Global. (The importance thing is to have lots of positive comments on the TED page, methinks.) TED Global's talks reach on average 40,000 viewers within the first 24 hours, and 500,000 within half a year.
Check it out, share, and especially: comment!