I went to TED2007 as a member of the press and was profoundly impressed by the quality of the events and the speakers. I drove home dumbfounded by the cascade of mind-boggling information in the presentations I saw there. I told my friends about TED and its effect on me, but I knew I wasn't able to convey how wonderful the speakers were. Fortunately, TED is offering the talks on its website in the form of 20-minute videos. There very high quality, and they're free.
I recommend starting with researcher Hans Rosling's presentation of his Trendalyzer software, which converts inscrutable database numbers into instantly-understandable and revealing dynamic animations.
In a follow-up to his now-legendary TED2006 presentation, Hans Rosling demonstrates how developing countries are pulling themselves out of poverty. He shows us the next generation of his Trendalyzer software -- which analyzes and displays data in amazingly accessible ways, allowing people to see patterns previously hidden behind mountains of stats. (Ten days later, he announced a deal with Google to acquire the software.) He also demos Dollar Street, a program that lets you peer in the windows of typical families worldwide living at different income levels. Be sure to watch straight through to the (literally) jaw-dropping finale.Link