A good blog goes out into the wide world of the webosphere to procure the tastiest morsels for its readers; too much self-promotion and things get stale fast. But, dear readers, there are exceptions to this rule, as I've learned this week. The Aspen Ideas Festival ended day before yesterday, and the "virtual festival" page boasts an embarrassment of riches. Already, a tightly-organized mountain of pithy video clips stands ready for you to stream instantly--most of them expertly edited courtesy of my colleague and erstwhile Exchange blogger Tarek Rizk, who is now The Aspen Institute's Director of Interactive Services.

Let's see, what mood are you in? Concerned? About the global food crisis? Paul Collier, author of "The Bottom Billion" is here to talk you through it. About Afghanistan and Iraq? Senator Sam Nunn and Colin Powell discuss bipartisan consensus on those wars.

Pensive? Shelby Steele, the Robert J. and Marion E. Oster Senior Fellow at the Hoover Institution at Stanford University, mulls his big idea: The end of white guilt.

Curious? Irshad Manji and Dalia Mogahed discuss the system of leadership in Islam.

Practical? Inventor Dean Kamen discusses the prosthetic arm his company invented for recent war veterans who had lost limbs, along with initiatives to bring potable water and sustainable electricity to underserved populations. Or listen to a stacked panel brainstorm where the next great R&D breakthroughs will come from.

Ambitious? Bill Clinton discusses Nelson Mandela's work on HIV/AIDS, rebuilding Liberia, market-based solutions to global health problems, revitalizing urban economies through environmental initiatives, and more.

Or, perhaps you just want to hear (and see) some really good news, like Ghanaian educator and Microsoft alum Patrick Awuah doing country-changing work.

Enjoy.