TED (Technology, Entertainment, Design): ideas worth spreading. This organization holds a conference each year dedicated to innovative thinkers and ideas. Its website hsa interesting talks from these conferences and is worth a look.
From the site:
"We believe passionately in the power of ideas to change attitudes, lives and ultimately, the world. So we're building here a clearinghouse that offers free knowledge and inspiration from the world's most inspired thinkers, and also a community of curious souls to engage with ideas and each other. Over time, you'll see us add talks and performances from other events, and solicit submissions from you, as well. This site, launched April 2007, is an ever-evolving work in progress, and you're an important part of it."