I was recently introduced to TED Talks, although I can't remember by whom (Hugh?). TED stands for Technology, Entertainment, Design. It's an annual conference that, "Brings together the world's most fascinating thinkers and doers, who are challenged to give the talk of their lives (in 18 minutes)." Don't let the acronym fool you - it covers much more than those three topics and every speaker is remarkable.
More 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."
I can't recommend TED Talks enough - I've never listened to one and thought, "Eh. That was a waste of time." Quite the opposite. I've embedded one of my favorites here. It's a talk by Rick Warren, author of A Purpose Driven Life. It's insightful and thought-provoking. Please take a few minutes to watch it.
You can subscribe to TED Talks through iTunes, or you can download them directly from the site, TED.com. They're available with the full video or audio only.